DR. IZABELLA WENTZ, PHARM D

Thyroid Pharmacist

Your Thyroid Prescription? A Beach Vacation!

Get Some Sunshine For Your Thyroid!

Medically reviewed and written by Izabella Wentz, PharmD, FASCP on April 29, 2020

/

emailEmail This Article To A Friend

This past January, I had a list of goals to focus on, and one big one (thankfully) was focused on immune support for my family. (In previous newsletters, I shared that we are currently taking reishi, S. boulardii and astragalus, to support secretory IgA, our own first line of defense in our respiratory and digestive tracts. We are also drinking bone broth and taking vitamin D.)

Do you ever feel worse in the winter than you do in the summer? A deficiency in vitamin D and a certain spectrum of light may hold the key to feeling better.

Autoimmune conditions are more likely to cluster in regions farther from the equator, and scientists have suggested that one of the potential reasons for this may be due to inadequate vitamin D levels, as vitamin D is primarily absorbed via sunshine on skin that is free of sunscreen.

Although those who live in warm climates are more likely to be absorbing enough of the sunshine vitamin, I often find that even people who live in warm climates such as Southern California, Florida, and Arizona, are vitamin D deficient at similar rates to people living in Wisconsin or Minnesota!

This is because our absorption of the vitamin from food sources is minimal, and is often further compromised by digestive enzyme deficiencies and gut conditions that lead to malabsorption of nutrients (such as infections and bacterial overgrowth).

As a result, vitamin D is one of the most under-recognized deficiencies in our society, and an estimated 85 percent of Americans may be deficient in it.

Vitamin D affects about 3,000 to 30,000 genes in our bodies. You may know that it’s necessary for helping your body to absorb calcium and strengthen your bones, but it also plays an important role in your immune system health, keeping its delicate balance in check. Vitamin D may prevent and modulate autoimmunity, while a deficiency in vitamin D is associated with improper immune function.

Many diseases have also been connected to low vitamin D levels, including heart disease, autoimmune disease, depression, and recently, thyroid conditions, including Hashimoto’s.

Optimizing your levels of this important nutrient may be a key part of the puzzle of restoring your health.

In this article, you’ll discover:

  • The role of vitamin D within the body
  • The link between vitamin D deficiency and thyroid conditions
  • How to test for vitamin D deficiency
  • Lifestyle tips and supplements to boost your vitamin D levels

What is Vitamin D?

Vitamin D is an essential nutrient and a precursor hormone that plays an important role in many biochemical functions within the body. The body produces vitamin D from cholesterol, when our skin is exposed to sunlight. Vitamin D is also found in certain foods, such as fatty fish and fortified dairy products. However, it is very difficult to get adequate amounts through diet alone.

Vitamin D has several important functions within the body, including the regulation of calcium and phosphorus absorption for bone and tooth growth.

This vitamin has also been shown to reduce one’s risk of developing Multiple Sclerosis (MS) and heart disease. It plays an important role in regulating mood and preventing depression as well. In fact, researchers behind a 2013 meta-analysis observed that, statistically, people with low vitamin D were at a much greater risk of depression. Another study found vitamin D receptors in the same areas of the brain associated with depression, and concluded that vitamin D plays an important role in brain function and mental health.

Of note, vitamin D can also support the immune system. (In fact, there are vitamin D receptors and activating enzymes on the surfaces of all white blood cells!) By enhancing the pathogen-fighting effects of monocytes and macrophages — white blood cells that are important parts of immune defense — and decreasing inflammation, vitamin D can help reduce the likelihood of contracting viruses, such as the seasonal flu.

An analysis of 10,933 trial participants, yielded the first definitive evidence that vitamin D does protect against respiratory infections. The results of the analysis revealed that, in trial participants, daily or weekly supplementation halved the risk of acute respiratory infection in people with the lowest baseline vitamin D levels (below 25 nmol/L). However, people with higher baseline vitamin D levels also benefited, although the effect was more modest (10 percent risk reduction). Overall, vitamin D supplementation was shown to be helpful in reducing the risk of acute respiratory infection.

The role of vitamin D in the health of the human body has been well described by researchers and the medical community alike. Recent studies have shown that serum vitamin D levels can be directly correlated with human life expectancy. Dr. William Grant, Ph.D., a vitamin D expert, has proposed that raising the optimal serum vitamin D level would prevent 30 percent of cancer deaths each year.

While it is estimated that 1 billion people worldwide have low levels of vitamin D, most don’t realize that they’re deficient, as symptoms are often subtle. Indications that you may have a vitamin D deficiency include:

  • Fatigue
  • Bone aches
  • Back pain
  • Muscle pain and weakness
  • Stress fractures (especially in your legs, pelvis, and hips)
  • Frequent illness or infections
  • Depression
  • Impaired wound healing
  • Osteoporosis
  • Hair loss

Additionally, in those with Hashimoto’s, elevated thyroid antibodies may be a sign of a vitamin D deficiency.

Vitamin D and Autoimmune Thyroid Conditions

Numerous studies have connected low vitamin D levels to various autoimmune conditions. For example, a deficiency in vitamin D has been correlated with higher rates of type 1 diabetes. In Finland, the incidence of type 1 diabetes in Finnish children increased when the daily recommended dosage of vitamin D was reduced from 4000-5000 IU in 1964, to 400 IU in 1992. Yet, incidences of diabetes in children have been decreasing since 2006, the year Finland decided to fortify all dietary milk products with vitamin D3.

Vitamin D may be beneficial in balancing the immune system through supporting the production of T-regulatory cells, and suppressing the Epstein-Barr virus, a virus that has been tied to numerous autoimmune conditions, including Hashimoto’s. Research has also shown that vitamin D actively prevents the development of autoimmunity in animal models.

Furthermore, there is a strong connection between vitamin D deficiency and various thyroid conditions. Vitamin D deficiency has been documented in Hashimoto’s, Graves’ disease, thyroid cancer, as well as postpartum thyroiditis.

One study in Turkey found that 92 percent of Hashimoto’s patients were deficient in vitamin D! In 2015, I surveyed 2332 of my readers with Hashimoto’s, and found that 68 percent of them reported also being diagnosed with vitamin D deficiency.

In recent years, numerous studies have come out connecting vitamin D deficiency with the development of thyroid antibodies. The lower the vitamin D levels, the higher the thyroid antibodies…

Studies have also found vitamin D reduces thyroid antibodies (TPO antibodies as well as TG antibodies) in those taking levothyroxine, as well as in people who have “euthyroid” Hashimoto’s, where their TSH is still normal, but they have elevated thyroid antibodies. A Greek study reported about a 20 percent overall decrease in thyroid antibodies with vitamin D supplementation.

Interestingly, researchers have suggested that vitamin D can slow down and prevent the progression of Hashimoto’s.

Who’s at Risk for Deficiency?

As skin cancer awareness and the use of sunscreen has become more widespread, most people are not getting adequate amounts of vitamin D through skin absorption. In fact, a clinical review published in The Journal of the American Osteopathic Association found that nearly 1 billion people worldwide may have insufficient levels of vitamin D related to sunscreen use. The study also found that vitamin D deficiency can be more prevalent in certain populations due to differences in skin pigmentation. For example, 95 percent of African American adults may have vitamin D deficiency.

Furthermore, those living in northern climates are especially at risk for vitamin D deficiency in the colder months, when the body is covered up.

However, even those living in warm countries may be at risk for low vitamin D levels. According to a Spanish study, although Spain receives sufficient sunlight radiation, it is difficult for its population to attain the recommended daily dose of vitamin D in the winter, as sunlight exposure is affected by Spain’s northern latitude. The study also noted that absorption could depend on the time of day and the position of the sun. At 10 am, almost 10 hours would be required to get enough vitamin D — but most people do not get 10 hours of sunshine — and if they did, that would be excessive exposure!

Testing for Vitamin D Deficiency

You may be wondering, how much vitamin D does your body need?

While the conventional reference ranges define vitamin D deficiency as under 30 ng/mL, vitamin D levels should be between 60 and 80 ng/mL for optimal thyroid receptor and immune system function.

There are two common forms of Vitamin D:

  • Vitamin D2 (ergocalciferol) – This form is found in some fortified foods and certain supplements.
  • Vitamin D3 (cholecalciferol) – This is the most biologically active form and is found in some high-quality supplements.

Vitamin D2 and D3 can both be converted by the liver and the kidney into the active form 1,25-dihydroxyvitamin D.

There are two available tests to check your Vitamin D levels: 1,25 (OH)D (which checks for the active form of vitamin D) and 25(OH)D (which checks for both D2 and D3). The 25(OH)D (25-hydroxyvitamin D) test is preferred, as it tests for both vitamin D2 and D3 levels and more accurately reflects one’s vitamin D status.

In my experience of performing case reviews for people with Hashimoto’s, vitamin D is the most common deficiency, followed by ferritin. However, as vitamin D excess can be problematic, I always recommend testing for these nutrients before supplementing.

If you have Hashimoto’s and have not had your vitamin D levels checked, I recommend testing as soon as possible. When supplementing, I recommend testing every 3-6 months to ensure you are getting adequate amounts, and then testing again in the winter season.

How to Get Your Vitamin D

Studies are now suggesting that much higher doses of vitamin D than the original recommended daily allowance of 400 IU per day should be taken. In fact, some studies show that 25(OH)D levels under 75 nmol/L may be too low for safety, and are associated with higher all-cause mortality. Moreover, one study found that a daily intake of 6201 IU was needed to achieve the Endocrine Society’s recommendation of serum 25(OH)D values at 75 nmol/L.

Furthermore, I believe that vitamin D is especially important for people who have had a prior Epstein-Barr infection, as the CD8+ T cells that fight the virus are vitamin D dependent.

So how can we get adequate amounts of vitamin D?

Vitamin D can be produced in the skin when exposed to sunlight, or it can be ingested from foods and supplements.

Ways to Get Vitamin D Infographic

1. Get Outside

One of the best ways to restore optimal vitamin D levels is through sun exposure. (As a bonus, sunlight has natural immune modulating benefits, and can also lift your mood.)

You could say that boosting your vitamin D levels can be a “walk in the park.” ? Vitamin D advocates recommend 15 minutes of unexposed skin, without sunscreen, around noon. Perhaps you can consider going for a walk during lunchtime? If you are fair-skinned and not used to the sun, you may need to start slower. Be careful not to overexpose yourself, to prevent getting a sunburn.

However, some health care professionals suggest that in cases of severe deficiency, getting adequate vitamin D levels would require you to spend four to six hours exposed on a sunny beach… for seven days straight. Sounds awful, right? However, many of us simply can’t get to the beach and live in climates that do not provide us with adequate amounts of sun exposure yearound, so we’ll need to look for alternate sources of vitamin D.

I generally recommend beach vacations for those of us living in Northern climates this time of year, but this isn’t always realistic for many — and not likely possible during the current shutdown. As such, we have to get sunshine when we can, as well as really focus on food and supplements.

2. Food Pharmacology

We can get vitamin D from dietary sources, including wild salmon (which contains 800 IU of D3 per 3.5 oz), cod liver oil (700 IU per teaspoon), fish, fortified dairy products and orange juice, and eggs.

However, the amount of vitamin D we absorb from food is limited, and people with fat malabsorption, food sensitivities, and other digestive issues common in Hashimoto’s, may be further impaired in their ability to absorb nutrients. Additionally, dairy, eggs and sugary drinks can be problematic for people with Hashimoto’s and blood sugar issues, so I don’t recommend relying on these foods for adequate vitamin D. This is why supplementation can be incredibly helpful, and why I recommend vitamin D supplements for most people with Hashimoto’s.

3. Supplements

My recommendation for those who can’t get out in the sun, is to take an oral vitamin D3 supplement.*

As the recommended daily allowance of 400 IU of vitamin D has been shown to be inadequate for most people, I generally recommend 5,000 IU per day as a starting point for my clients with Hashimoto’s. Taking your vitamin D supplements with a meal can be helpful in increasing its absorption by 30-50 percent.

However, I also recommend monitoring vitamin D levels to ensure that levels are within the optimal range (60 to 80 ng/mL for optimal thyroid receptor and immune system function).

In some cases, practitioners may utilize doses as high as 20,000 IU to get to the goal, but I would not recommend doing this on your own, as vitamin D is a fat soluble vitamin and can build up. (If you’re looking for a practitioner to help you on your journey, you can download my list of recommended clinicians, here.)

Please note: Some people with Hashimoto’s may also be deficient in Vitamin K, especially when they have issues with fat malabsorption. Vitamin K deficiency is not routinely tested, but symptoms may include easy bruising, excess bleeding and heavy menstrual periods.

Supplementing with vitamin D when one is deficient in vitamin K can have a negative impact on our arteries. Vitamin D supplements liberate calcium from our bodies, and in the case of vitamin K deficiency, the calcium may go to our arteries instead of our bones. Adequate vitamin K can prevent arterial calcification and encourage more calcium into the bones, which is beneficial in osteoporosis, a common condition seen in people with Hashimoto’s. As such, I recommend taking vitamin D with or without added vitamin K, depending on your individual needs.

The vitamin D supplements I recommend include:

*Please note, soybean peptone is used as a raw material in the fermentation process for the vitamin K2. The finished vitamin K2 is tested for contamination of soy protein and contains less than 10 ppm (parts per million). If you do not tolerate soy, you may want to opt for the Pure Encapsulations version, without vitamin K, instead.

Additionally, vitamin K supplements are generally safe and well tolerated, but if you take blood thinning medications like warfarin, speak to your doctor or pharmacist before starting a supplement that contains vitamin K.

Blue Light Therapy – Another Winter Tool

If you find yourself feeling worse in the winter than you do in the summer (and especially if you have the winter blues), vitamin D may help, but you would likely have the best outcomes if you combined it with blue light therapy.

A recent study published in Scientific Report suggests that exposure to sunlight may be beneficial to our immune system, via mechanisms that are separate from vitamin D. The researchers noted that blue light, in particular, which is produced naturally by the sun, may activate key immune cells and boost immune function. In their study, blue light exposure triggered the synthesis of hydrogen peroxide, which inactivated pathways that signaled an increase of motility of the T cells (which play a role in mounting an immune response against infections) in both mouse and human T lymphocytes.

Blue light is known to reach the second layer of the skin, where there is a higher concentration of T lymphocytes compared to those found in the bloodstream. The study, therefore, suggests that there could be a separate pathway through which sunlight — specifically blue light exposure — may boost the immune system.

Blue light therapy devices have also been studied in seasonal affective disorder (SAD), aka “the winter blues,” with great success.

I like this blue light therapy device to reap the benefits of blue light exposure anytime, from the comfort of my home, without having to wait for the weatherman to announce a sunny day. It’s also great to have around during the winter. While I recommend using it for about 15 minutes a day, you can set the timer according to your needs. This light therapy can also be really helpful if you have trouble waking up in the mornings. I recommend keeping it at your bedside and turning it on when you wake up, or keeping it in your bathroom and turning it on while you get ready. The little blue light therapy device has helped me through many dark winters in Chicago, cloudy days in Amsterdam, and long Colorado winters.

The Takeaway

Vitamin D has been helpful in my recovery, and I’ve found that exposure to sunshine, vitamin D supplements, and blue light therapy are strategies that consistently make my clients and readers feel better. In my survey of 2232 people with Hashimoto’s, 67 percent of my readers reported their fatigue improved and said they felt significantly better after taking a vitamin D supplement. Improvements in mood, pain reduction, as well as a reduction in antibody titers, are also things I see time and time again.

Because of the prevalence of vitamin D deficiency in Hashimoto’s, and due to its known connection to autoimmune disease in general, I’ve recommended vitamin D testing and supplementing to my readers and clients since 2013. I have noticed that those who are struggling most with thyroid symptoms often have vitamin D deficiency; and those who feel their best and/or who are in remission from Hashimoto’s tend to have vitamin D levels between 60-80 ng/mL. While it’s not a magic bullet, optimizing vitamin D levels can be a really simple and inexpensive way to feel better and address the immune system.

I’d love to hear from you! How much sunshine do you get in your part of the world? Do you take a vitamin D supplement?

As always, I wish you the best on your journey to better health.

P.S. Looking to start your thyroid journey? You can download a free Thyroid Diet Guide, 10 Thyroid Friendly Recipes, and the Nutrient Depletions and Digestion Chapter from my Root Cause book for free by going to www.thyroidpharmacist.com/gift. You will also receive occasional updates about new research, resources, giveaways and helpful information.

For future updates, make sure to follow us on Facebook too.

If you’re curious about other vitamin deficiencies and symptoms related to them, you can download my FREE Supplements to Subdue Symptoms eBook!

References

  1. Tamer G, Arik S, Tamer I, Coksert D. Relative vitamin D insufficiency in Hashimoto’s thyroiditis. Thyroid. 2011;21(8):891-896. doi:10.1089/thy.2009.0200.
  2. Wang J, Lv S, Chen G, et al. Meta-analysis of the association between vitamin D and autoimmune thyroid disease. Nutrients. 2015;7(4):2485-2498. doi:10.3390/nu7042485.
  3. Vahabi P, Aminorroaya A, Amini M, et al. Effect of Vitamin D deficiency treatment on thyroid function and autoimmunity markers in Hashimoto’s thyroiditis: A double-blind randomized placebo-controlled clinical trial. Journal of Research in Medical Sciences : The Official Journal of Isfahan University of Medical Sciences. 2017;22:103. doi:10.4103/jrms.JRMS_1048_16.
  4. Papadimitriou DT. The Big Vitamin D Mistake. Journal of Preventive Medicine and Public Health. 2017;50(4):278-281. doi:10.3961/jpmph.16.111.
  5. Some Benefits of Sunlight May Be Independent of Vitamin D. Medscape.com. https://www.medscape.com/viewarticle/874371. Published January 18, 2017. Accessed January 23, 2018.
  6. Pfotenhauer K, Shubrook J. Vitamin D Deficiency, Its Role in Health and Disease, and Current Supplementation Recommendations. J Am Osteopath Assoc. 2017;117(5), 301-305.
  7. Serrano M, Cañada J, Moreno J, Gurrea G. Solar ultraviolet doses and vitamin D in a northern mid-latitude. Sci Total Environ. 2017;574:744-750. doi: 10.1016/j.scitotenv.2016.09.102
  8. Baker T. Vitamin D insufficiency, low rate of DNA methylation in black teens may increase disease risk. Medical College of Georgia at Augusta University and ScienceDaily. www.sciencedaily.com/releases/2016/04/160425143108.htm. Published April 25, 2016. Accessed January 18, 2018.
  9. MayoClinic. Vitamin D toxicity rare in people who take supplements, researchers report. Mayo Clinic and ScienceDaily. www.sciencedaily.com/releases/2015/04/150430134852.htm. Published April 30, 2015. Accessed January 23, 2018
  10. Smith E, Frankenburg E, Goldstein S, Koshizuka K, Elstner E, Said J, et al. Effects of long-term administration of vitamin D3 analogs to mice. Journal of Endocrinology. 2010;165(1):163-172.
  11. Baeke F, Takiishi T, Korf H, Gysemans C, Mathieu C. Vitamin D: modulator of the immune system. Current opinion in pharmacology. 2010;10(4):482-496.
  12. Strieder T, Prummel M, Tijssen J, Endert E, Wiersinga W. Risk factors for and prevalence of thyroid disorders in a cross‐sectional study among healthy female relatives of patients with autoimmune thyroid disease. Clinical endocrinology. 2003;59(3):396-401.
  13. Krysiak R, Szkróbka W, Okopień B. Moderate-dose simvastatin therapy potentiates the effect of vitamin D on thyroid autoimmunity in levothyroxine-treated women with Hashimoto’s thyroiditis and vitamin D insufficiency. Pharmacol Rep. 2018;70(1):93-97. doi: 10.1016/j.pharep.2017.07.019.
  14. Krysiak R, Szkróbka W, Okopień B. The Effect of Vitamin D on Thyroid Autoimmunity in Levothyroxine-Treated Women with Hashimoto’s Thyroiditis and Normal Vitamin D Status. Exp Clin Endocrinol Diabetes. 2017;125(4):229-233. doi: 10.1055/s-0042-123038.
  15. Ucan B, Sahin M, Sayki Arslan M, Colak Bozkurt N, Kizilgul M, Güngünes A, et al. Vitamin D Treatment in Patients with Hashimoto’s Thyroiditis may Decrease the Development of Hypothyroidism. Int J Vitam Nutr Res. 2017;12:1-9. doi: 10.1024/0300-9831/a000269.
  16. Kim D. The Role of Vitamin D in Thyroid Diseases. Int J Mol Sci. 2017;18(9). pii: E1949. doi: 10.3390/ijms18091949.
  17. Ke W, Sun T, Zhang Y, He L, Wu Q, Liu J, et al. 25-Hydroxyvitamin D serum level in Hashimoto’s thyroiditis, but not Graves’ disease is relatively deficient. Endocr J. 2017;64(6):581-587. doi: 10.1507/endocrj.EJ16-0547.
  18. Liontiris MI, Mazokopakis EE. A concise review of Hashimoto thyroiditis (HT) and the importance of iodine, selenium, vitamin D and gluten on the autoimmunity and dietary management of HT patients. Points that need more investigation. Hell J Nucl Med. 2017;20(1):51-56. doi: 10.1967/s002449910507.
  19. Krysiak R, Szkróbka W, Okopień B. The Effect of Vitamin D on Thyroid Autoimmunity in Levothyroxine-Treated Women with Hashimoto’s Thyroiditis and Normal Vitamin D Status. Exp Clin Endocrinol Diabetes. 2017;125(4):229-233. doi: 10.1055/s-0042-123038.
  20. Altieri B, Muscogiuri G, Barrea L, Mathieu C, Vallone CV, Mascitelli L, et al. Does vitamin D play a role in autoimmune endocrine disorders? A proof of concept. Rev Endocr Metab Disord. 2017;18(3):335-346. doi: 10.1007/s11154-016-9405-9.
  21. Kim D. Low vitamin D status is associated with hypothyroid Hashimoto’s thyroiditis. Hormones (Athens). 2016;15(3):385-393. doi: 10.14310/horm.2002.1681.
  22. Maciejewski A, Wójcicka M, Roszak M, Losy J, Łącka K. Assessment of Vitamin D Level in Autoimmune Thyroiditis Patients and a Control Group in the Polish Population. Adv Clin Exp Med. 2015;24(5):801-6. doi: 10.17219/acem/29183.
  23. Mazokopakis EE, Papadomanolaki MG, Tsekouras KC, Evangelopoulos AD, Kotsiris DA, Tzortzinis AA. Is vitamin D related to pathogenesis and treatment of Hashimoto’s thyroiditis? Hell J Nucl Med. 2015;18(3):222-7.
  24. Ma J, Wu D, Li C, Fan C, Chao N, Liu J, et al. Lower Serum 25-Hydroxyvitamin D Level is Associated With 3 Types of Autoimmune Thyroid Diseases. Medicine (Baltimore). 2015;94(39):e1639. doi: 10.1097/MD.0000000000001639.
  25. Office of Dietary Supplements. Vitamin K – Health Professional Fact Sheet. National Institutes of Health. https://ods.od.nih.gov/factsheets/VitaminK-HealthProfessional/. Updated March 2, 2018. Accessed March 13, 2018.
  26. van Ballegooijen AJ, Pilz S, Tomaschitz A, Grübler MR, Verheyen N. The Synergistic Interplay between Vitamins D and K for Bone and Cardiovascular Health: A Narrative Review. Int J Endocrinol. 2017;2017:7454376. doi: 10.1155/2017/7454376.
  27. Holick MF. The vitamin D epidemic and its health consequences. J Nutr. 2005;135(11):2739S-48S.
  28. Gouni-Berthold I, Krone W, Berthold HK. Vitamin D and cardiovascular disease. Curr Vasc Pharmacol. 2009;7(3):414-22.
  29. Iwamoto J, Yeh JK, Takeda T, Ichimura S, Sato Y. Comparative effects of vitamin K and vitamin D supplementation on prevention of osteopenia in calcium-deficient young rats. Bone. 2003;33(4):557-66.
  30. Braam LA, Hoeks AP, Brouns F, Hamulyák K, Gerichhausen MJ, Vermeer C. Beneficial effects of vitamins D and K on the elastic properties of the vessel wall in postmenopausal women: a follow-up study. Thromb Haemost. 2004;91(2):373-80.
  31. Wallin R, Wajih N, Greenwood GT, Sane DC. Arterial calcification: a review of mechanisms, animal models, and the prospects for therapy. Med Res Rev. 2001;21(4):274-301.
  32. Kidd PM. Vitamins D and K as pleiotropic nutrients: clinical importance to the skeletal and cardiovascular systems and preliminary evidence for synergy. Altern Med Rev. 2010;15(3):199-222.
  33. Sokoll LJ, Booth LS, Davidson KW, Dalla GE, Sadowski. Diurnal variation in total and undercarboxylated osteocalcin: influence of increased dietary phylloquinone. Calcif tissue Int. 1998;62(5):447-52.
  34. Howland RH. An overview of seasonal affective disorder and its treatment options. Phys Sportsmed. 2009;37(4):104-15. doi: 10.3810/psm.2009.12.1748.
  35. Eyles DW, Smith S, Kinobe R, Hewison M, McGrath. Distribution of the vitamin D receptor and 1 alpha-hydroxylase in human brain. J Chem Neuroanat. 2005 Jan;29(1):21-30.
  36. Martineau AR, Jolliffe DA, Hooper RL, Greenberg L, Aloia JF, Bergman P, et al. Vitamin D supplementation to prevent acute respiratory tract infections: systematic review and meta-analysis of individual participant data. BMJ, 2017; i6583 DOI: 10.1136/bmj.i6583

Note: Originally published in October 2016, this article has been revised and updated for accuracy and thoroughness.

Print Friendly, PDF & Email
emailEmail This Article To A Friend

Recent Posts

Reader Interactions

Comments

  1. Your comments about EBV inhibiting vitD uptake are very interesting. I have been supplementing with 6000ius of D3 for years and get 20-30mins of sun exposure per day at midday. But to no avail, my D levels to do not respond.
    I’ve been researching the reasons for malabsorption syndrome eg. pancreatic insufficiency, celiac disease, hepatic or kidney disease and prolonged use of medications such as antifungals, antiseizure drugs, cholestyramine and glucocorticoids.
    But I didn’t know that EBV could be a reason. I had EBV 23 years ago, Dr Wentz, do you think EBV can reoccur? And if I have the antibodies for it, how do I test for EBV?
    Reply

  2. Hi Jane,
    Thank you for writing. EBV can be a trigger for autoimmunity and can recur. Licorice root, olive leaf and some antivirals may be helpful… You can test for it through antibody blood tests. EBV can still however, be troublesome even when it is dormant. The best approach to my knowledge is to strengthen the adrenals and the gut, as well as getting your Vitamin D levels up allowing the body to overcome EBV on its own. If you have not picked up a copy of my book, I do have a lot of info on strengthening the adrenals, gut and finding your root cause. Hope that helps
    Reply

  4. To Ashley below:
    EBV is Epstein Barr Virus.
    (Rather a nasty piece of work! I remember learning about it during my nurse training…many years ago now….will dash off and get tested!!)
    Reply

    • Mary- Without going into too much detail, the first of the crucial defining moments in my disease development may have started during my undergraduate studies at the University of Illinois. Due to the communal living setting of dormitories (and less than stellar hygiene habits of most college students) I had recurrent strep throat infections and even contracted mononucleosis, a viral infection caused by the Epstein-Barr Virus (EBV), which is implicated in triggering many autoimmune conditions. I received multiple courses of antibiotics as well as flu shots (which may be associated with EBV infections), and started birth control for menstrual cramps.

      It is my belief that this combination had a profound impact on my gut flora, and thus my immune system.

      Epstein-Barr is a virus that causes mononucleosis (commonly called “Mono”) , a debilitating viral infection that is common among college students, and is also known as the “kissing disease,” because individuals are exposed to the virus through saliva of those who are infected.

      Specific immune cells known as CD8+ T cells are needed to fight off the Epstein-Barr virus, however, some individuals may have a low baseline level of these types of immune cells. (CD8+ T cells decrease with age, are lower in women, and in the presence of low vitamin D intake). When these fighter cells are low, the Epstein-Barr virus may take up residence in our organs (such as the thyroid) and essentially hijack the organ to help the virus hide and multiply.

      The timing of infection may also matter as well, for example, children in developing countries usually contract the Epstein-Barr Virus when they are under the age of 10. This usually results in an asymptomatic infection—one that does not cause them symptoms. In contrast, in developed countries, where individuals are not usually exposed to the virus until they are in high school or college, the infection is symptomatic in 50% of the older kids affected. This is because by the time we reach college age, CD8+ T cells, the ones that fight EBV, have declined by threefold compared with the number of cells we had in childhood.

      Additionally, animal fat and broths, soups and stews support the body’s ability to suppress the viruses. Monolaurin/lauric acid, one of the components of coconut oil, has been found to be active against the Epstein-Barr virus. Replication of many viruses including Epstein-Barr is inhibited by glycyrrhizic acid, an active component of licorice root. Quercetin, Co-Enzyme Q10, N-Acetylcysteine, and glutathione were also reported to be helpful in chronic fatigue syndrome because of their anti-viral properties.

      EPSTEIN-BARR VIRUS AND HASHIMOTO’S
      https://thyroidpharmacist.com/articles/epstein-barr-virus-and-hashimotos

      Reply

  5. Are there foods that inhibit D uptake? My D levels are at 26 and I got a lot of sun this summer versus last year my D was 37 after spending 8 months in rainy London. I’m baffled.
    Suggestions on what to look into?
    I also can’t hold iron. Pernicious anemia with really low ferritin levels. Are these related?
    Reply

  6. Hi Adrienne, I once read that in someone with Vitamin D levels that low, you would have to spend 2-4 hours, 5 days a week in the sun to get them to target. Talk to your doctor about a Vitamin D supplement of at 5-10K IU . Absorption issues may cause you a great difficulty in absorbing iron and Vitamin D from foods. You may have a gut infection, lack of a digestive enzymes, nutrient deficiency or food sensitivity or combo of all of the above that is contributing to impaired absorption of nutrients. Hope that you will take a look at my book. I think it will help you. Wishing you all the best!
    Reply

  8. I would like information about future conference dates and locations of the conference you recently attended. ( Advanced Gastrointestinal Issues and Functional Medicine)
    Reply

  9. Hi Dr. Mason, thank you for stopping by! Be sure to check out the Institute of Functional Medicine and A4M, they have really amazing programs. The annual A4M meeting I will be attending close to you is in Vegas in December. I am also covering the International Congress for Clinicians in Complementary & Integrative Medicine this week @ Northwestern in Chicago, and will be posting info on it as it pertains to autoimmunity and depression, my other passion 🙂 Be sure to subscribe to the blog to get my updates
    Reply

  10. Please explain what you mean by a “safe” tanning bed? I am vitamin D deficient and having trouble raising my level with supplements.
    Reply

    • Adeline- The best way to restore optimal vitamin D level is through sun exposure, safe tanning beds, and an oral vitamin D3 supplement. The secondary best sources of vitamin D are from foods like wild salmon (800 IU/3.5 oz of D3); and cod liver oil (700 IU per teaspoon).

      Reply

  11. 6 months since Diagnosis of Hashimotos, 6 months of Autoimmune Diet and P.E. Vitamin D3 supplementation (2000 iu) and NO improvement in 25(OH)D levels, stuck at 25. It seems like I’m wasting money on supplements and the special diet while trading weight loss (the only positive result) for TPO increase. 56% higher today than last November. Currently at 542 with an increasing upward trajectory. What can I do?
    Reply

  13. i have to say i started supplementing vitamin D and after 20 days or so developed mole?sensitivity , every one started to be very sensitive on the touch, so i stopped taking it……was taking 3000 i.j. per day, and tested was amrginally lower then the lower level around 35 i think
    Reply

    • Ivy- Here are some other sources of Vitamin D: cod liver oil, fish, fortified dairy and orange juice, eggs, and most importantly, sunlight. 🙂

      Reply

  15. Dear Izabella
    Is 15 minutes of exposure to sunlight the daily limit or is the exposure limit within 48 hours or even a second exposure after several hours on the same day?
    Reply

    • Terence- Vitamin D advocates recommend 15 minutes of unexposed skin without sunscreen around noon. Perhaps you can go for a walk during lunchtime? If you are fair skinned and not used to the sun, you may need to start slower. Be careful not to overexpose yourself to prevent getting a sunburn.

      Reply

  16. i want to report back that 4 weeks of sunshine raised my d3 in my blood for 25%…..i did no oral supplementing, since i had that problem with sensitive moles…and still did not figure out why it happens, i searched in the studies so much but nothing i could dig up…..the only thing i did dig up is that there are naked mole rats that have 0 d vitamin, and no cancer at all! and live long about 30 years!…..vitamin D is just like thyroid having receptors in every cell, and having prohormone and hormon…..so there must be some special role of that vitamin…so i wonder how it all functions…..and this thing that my moles get sensitive to oral supplementing d3 is so strange….and may be a clue to something?
    Reply

  17. I was diagnosed with Graves’ disease in 1991. Had thyroidectomy in 1993. Biopsy was done, papillary carcinoma. Was treated with I 131 in 1993 and 1995, when thyroid uptake and scan showed another hot spot. Been on same dose for years, they keep me on the hyperthyroid side to suppress Cancer from returning. I have leg cramps a lot. Magnesium helps, have some bowel issues; but no fatigue or weight problems. I am vitamin D def and take 2,000 U of Vit D 3 but my level never gets above 32. How much should I take. Also take vitamin B 12 500 mcg daily.
    Thanks for your time and interest. Will be purchasing your
    Reply

    • Kathleen- I can’t make any direct medical recommendations to any single person for legal reasons. I recommend that you find a doctor that will let you be a part of your healthcare team! Most thyroid conditions result from the immune system attacking the thyroid because the immune system is out of balance. Even when the thyroid is taken out surgically, is ‘dead’, or treated with radioactive iodine the autoimmunity still persists in most cases. Many people will have their thyroids removed, and will develop new autoimmune disorders such as Lupus, Rheumatoid arthritis, etc. The immune system just finds a different target. We need to re-balance the immune system to prevent this (sometimes the autoimmunity can be reversed as well). The gut determines your immune system. With the exception of discussing proper thyroid medication dosing, the majority of my website and my book focuses on balancing the immune system. The info I present is based on my own research and journey for overcoming my autoimmune thyroid condition.

      HASHIMOTO’S ROOT CAUSE BOOK
      http://www.amazon.com/gp/product/0615825796?ie=UTF8&camp=1789&creativeASIN=0615825796&linkCode=xm2&tag=thyroipharma-20

      Reply

  18. This blog is profoundly helpful. THANK YOU SO MUCH!! I bought your book Izabella and will now return to reading it again….as have been quite overwhelmed and focused on another of my autoimmunities.
    So it seems infection, gut dysbiosis, vitamin and mineral deficiency, intestinal permeability, enzyme insufficiency are all factors? What about hormonal issues? I was wondering whether you might possibly have devised a comprehensive list of all the contributory factors? Or does this keep growing?
    Again thank you and very best wishes
    Mary.
    Reply

  20. When diagnosed with breast cancer nearly 5 years ago my D was at 8. 50,000 IU vitamin D3 1 time weekly got it to 39 eventually. I get occasional testing at my own request. At last Onc visit they forgot to do. This is not universally taken seriously. I am usually low but docs want you to take daily OTC. Does not work as well.
    Reply

    • Helena- Sources of vitamin D include : cod liver oil, fish, fortified dairy and orange juice, eggs, and most importantly, sunlight. 🙂

      Reply

    • Dmg- As skin cancer awareness and the use of sunscreen has become more widespread, you just want to be aware of how much you are exposed to. Be careful not to overexpose yourself to prevent getting a sunburn.

      Reply

  26. My vitamin D is 5.6. Dr. Is putting me on 10,000 and then 15,000 alternating days. I hope that helps.
    Reply

  27. i have an allergy to the sun and have graves treated with ri and on sup thyroid…what then?
    Reply

    • Georgette- Sources of vitamin D include : cod liver oil, fish, fortified dairy and orange juice, eggs, and most importantly, sunlight.Graves and Hashimoto’s are both autoimmune conditions that affect the thyroid. They are thought to be closely related. Sometimes one turns into the other. The difference is the site of the antibody attack. In Hashimoto’s, the antibodies are found to thyroglobulin (in 80%) and thyroid peroxidase (TPO) enzyme (in 95% of people)-Hashimoto’s results in hypothyroidism and is usually treated with Synthroid and replacement hormone.

      The same antibodies may be present in a smaller percentage of people who have Graves, but the main antibody is to the TSH Receptor (TSHR-Ab). Usually people with Graves have hyperthyroidism and they are treated conventionally with thyroid suppressing drugs (methimazole) or radioactive iodine to destroy the thyroid. At that point, the thyroid will no longer produce hormones on its own and these people end up on Synthroid as well.

      Most thyroid conditions result from the immune system attacking the thyroid because the immune system is out of balance. Even when the thyroid is taken out surgically or treated with radioactive iodine the autoimmunity still persists in most cases. Many people will have their thyroids removed, and will develop new autoimmune disorders such as Lupus, Rheumatoid arthritis, etc. The immune system just finds a different target. We need to rebalance the immune system to prevent this (sometimes the autoimmunity can be reversed as well! The gut determines your immune system. With the exception of discussing proper thyroid medication dosing, the majority of my website and my book focuses on balancing the immune system. The info I present is based on my own research in journey for overcoming my autoimmune thyroid condition.

      http://www.amazon.com/gp/product/0615825796?ie=UTF8&camp=1789&creativeASIN=0615825796&linkCode=xm2&tag=thyroipharma-20

      Reply

  29. Hi Dr. Wentz,
    So, I have been on the very high dosages of Vit D as you suggest, and my lab levels have gone up. However, I don’t know that I “feel” the relief I am expecting? Recently, I found information from Dr Robbins on gotmag.org, and he asserts that Vit D deficiency is actually a magnesium deficiency (I think that is what he is saying). He recommends getting the the Vitamin D, 1, 25-dihydroxy test, rather than just getting the Vitamin D, 25-dihydroxy.
    I’m not trying to pit “doctor against doctor”… I’m just someone trying to figure this all out, and trying to get varying opinions and perspectives. 🙂 Thank you so much for sharing your knowledge!

    Reply

  30. Hi Izabella, Just got your book and it’s so informative, thank you! I have recently been diagnised with Hashimoto’s (stage 2 according to your book I think) and I have recently started taking Vitamin D3 with K added in drops as my blood test came back borderline low. However, I also did a hair mineral analysis recently which showed a high calcium to potassium level with very low boron. Mr google says that taking vitamin D3 can be harmful in such a case as it may drive calcium up even more and lower potassium. Is this your opinion? Should I stop taking the vitamin D and get in th sun instead? I have to say I have been feeling worse symptoms since I started the D3. Also is there a way to reduce my calcium levels and bring up the potassium? Thank you so much for all your amazing work and info. I feel like I’m finally figuring out my health because of it.

    Reply

  31. My daughters (9 and 12) were both diagnosed with Hashimotos and vitamin D deficiency. Does this mean that if they had enough vitamin D we could have prevented that? We live in Arizona so there is plenty of sunshine and I also gave them 400 units per day. Now they take 5000 and 2000 alternating… if we fix the vitamin D deficiency can we reverse the hypothyroidism and Hashimotos? Thanks

    Reply

  32. I live in Minnesota and I’ve been low on vitamin D for years. I was on 50,000 IU of D2 a week for years. After finding out I had hashimoto’s and learning about it’s link to hair loss, I switched to a D3 supplement and increased my dose. I take 5,000 IU the times a day and I’m STILL in the low range. My doctor doesn’t understand why I don’t absorb it, so she’s investigating possible reasons.

    I’ve never been a fan of summer so I don’t go outside often unless it’s 70 degrees or less. The thoughtof being our the on heat and humidity… blech.

    Reply

  33. Hello Izabella.
    I think it is important that you clarify that it is vit K2, and not just “vit K”, the one involved in the release and deposition of Calcium in the body. Also it would have to be done in conjunction with VitA, to be precise. It is a triade.
    Also, VitD can be consumed safely to higher doses. 20,000 IU is not that “crazy number”. If I recall correctly, around 90K UI would begin to be a “too much number”. But you area right that caution is advised.

    Reply

  34. I wonder if its a chicken and egg scenario. I lived in Dubai, the desert!, for 9 years and was still hugely Vitamin D deficient. I have hashimotos. wondering if the autoimmmune disease caused the deficiency vs the other way around. same with intestinal permeability. a study on rats recently found that the leaky gut was a byproduct of autoimmunity.

    Reply

  35. Hi, I spent four months in Hawaii then back in the North. Three montjs later my D is 32. I have IBS and slight pernicious anemia without any other “official” deficiency. So it looks like sunshine did not do it for me. However, I started to feel much better when I take 1 tablespoon fish oil a day.
    How much Vit K would you recommend?

    Reply

    • Suzanne – thank you for sharing! I wish I could give you more direct advice but, each person will react differently. I would advise you to ask your personal pharmacist or a trusted clinician who’s care you are under. I am not able to respond directly to these types of questions here. I also don’t recommend starting multiple supplements all at once. I recommend starting one at a time, and then adding another a week or so later once it has been confirmed that the first supplement is not causing any harm.

      I do have a full supplements chapter in my book. Have you checked it out? Not everyone should be taking every supplement and the book will help uncover your root cause. This will help you figure out your supplementation.

      Hashimoto’s Root Cause
      http://amzn.to/2DoeC80

      Hashimoto’s Protocol
      http://amzn.to/2B5J1mq

      Reply

  36. Greetings from Romania! I have an autoimmune thyroiditis and I can not stand the sun, heat, suffocate, my thyroid hurts, it swells, faint, I do not go to the beach, to the sea. Winter, I’m cold very cold, it hurts my heart, it fails, it stops breathing, my hands are frozen in gloves, I can not move them. What to do? My doctor prescribed euthyrox 25 ug and selenium. Thank you. You’re wonderful, the best specialist.
    Translation with Google.

    Reply

  37. I totally agree with using a tanning bed to feel better. At the time when I used them, I wasn’t aware I had Hashimoto’s, and really didn’t think about Vitamin D, I just knew it made me feel better. It wasn’t even the tan that made me feel better, it was just a deep healthy feeling. I can’t explain it much better than that. I know now it was probably the Vitamin D, and so as soon as I can I’m going to get my tanning bed hooked back up! I do get outside a lot in the spring and fall, (can’t really tolerate the summer heat) I do have heat intolerance, and have been hospitalized with dehydration/thyroid storm. Nutritional deficiencies, not enough water, etc. along with the Hashimoto’s caused this I’m assuming, although at that time the doctor’s said I had hyperthyroidism. I go to a naturopath now, and have been diagnosed with Hashimoto’s.

    Reply

    • Gaye – thank you for sharing your journey. <3 Graves and Hashimoto's are both autoimmune conditions that affect the thyroid. They are thought to be closely related. Sometimes one turns into the other. The difference is the site of the antibody attack. In Hashimoto's, the antibodies are found to thyroglobulin (in 80%) and thyroid peroxidase (TPO) enzyme (in 95% of people)-Hashimoto's results in hypothyroidism and is usually treated with Synthroid and replacement hormone.

      The same antibodies may be present in a smaller percentage of people who have Graves, but the main antibody is to the TSH Receptor (TSHR-Ab). Usually, people with Graves have hyperthyroidism, and they are treated conventionally with thyroid suppressing drugs (methimazole) or radioactive iodine to destroy the thyroid. At that point, the thyroid will no longer produce hormones on its own, and these people end up on Synthroid as well.

      Most thyroid conditions result from the immune system attacking the thyroid because the immune system is out of balance. Even when the thyroid is taken out surgically or treated with radioactive iodine the autoimmunity still persists in most cases. Many people will have their thyroids removed, and will develop new autoimmune disorders such as Lupus, Rheumatoid arthritis, etc. The immune system just finds a different target.

      We need to rebalance the immune system to prevent this. Sometimes the autoimmunity can be reversed as well! The gut determines your immune system. With the exception of discussing proper thyroid medication dosing, the majority of my website and my book focuses on balancing the immune system. The info I present is based on my own research and journey for overcoming my autoimmune thyroid condition. Here are the links to my books:

      Hashimoto’s Root Cause
      http://amzn.to/2DoeC80

      Hashimoto’s Protocol
      http://amzn.to/2B5J1mq

      Reply

  38. I ordered numerous helpful tests by convincing my endo and my primary i need to find the root cause of my symptoms and the info I’ve learned from you has really helped a lot! I uncovered sublclinial hypothryoidism, estrogen dominance, Vitamin D deficiency, and I actually do not have elevated thryoid antibodies. But I didn’t do well on the very small dose of levothryoxine I took and my endo thinks I should just give up on it since my TSH is 4.5! Ridicoulous idea because I am very symptomatic.

    I’d like to know if you ever treated patients with an unusual reaction to levothryoxine. I am one of the unlucky ones who has the rare side effect. My endo agreed to switching my meds from the generic to the brand Synthroid, and if I still get the side effects then she refused to precribe Armour because she doesn’t trust anything that is naturally derived from pigs or cows.

    If I get my functional medical dr. to give me Armour, and I still react to that, what other meds are out there to consider that you might be aware of? Though endo brought up Tironsint, I cannot digest capsules and it is unaffordable as it isn’t covered by my insurance. Any sucesses that you may have had with other patients who can’t take levothryoxine and which alternates you saw better success with, I’d really like to hear about and I’ll ask the functional dr. what she thinks if it is possibly right for my situation. THANKS!!!!!!!!!!

    Reply

  39. Greetings from Romania!
    In the shade, in summer I suffocate, I can not breathe, I’m faint, I can not do my daily activities. I can not stay in the sun. What do you recommend? Diagnosis: autoimmune thyroiditis, ischemic cardiopathy, angina pectoris unstable.
    Thank you!

    Reply

  40. Can vitamin d3 supplements lower TSH? I started taking it and after 25 days have insomia and hypnic jerks and feel gittery and anxious, but my doctor tested my TSH about a little over month ago and refuses to test again. At my last blood draw it had fallen from almost 10, to 3.22. Fairly quickly. In just a month or two. Is it possible since starting vitamin D its lowered it even further?

    Reply

    • Madison – thank you for reaching out. I am so sorry you are struggling with all of this. <3 I recommend that you discuss this with your practitioner. Most people feel best with a TSH of around 1 or lower and with a Free T4 and Free T3 in the upper half of the range. It is expected that your TSH will be very suppressed when optimal on NDT medication. How much thyroid replacement therapy is needed is unique and different for each person, so it's important to work with a functional medicine practitioner or a doctor, who can closely monitor your dosage and your progress. Every six weeks is usually a good schedule for testing your thyroid hormones.

      Here is a research article which might help further:
      TOP 10 THYROID TESTS FOR DIAGNOSIS
      https://thyroidpharmacist.com/articles/top-6-thyroid-tests/

      Reply

    • Marine – thank you so much for your support. <3 If you have Hashimoto’s and have not had your Vitamin D levels checked, I recommend testing. When supplementing, I recommend testing every 3-6 months to ensure you are getting adequate amounts, and then testing again in the winter season. Vitamin D levels should be checked at regular intervals, especially in the winter seasons. Liquid may be better absorbed by some, but I’ve also seen great absorption with the capsules. Here is a link to the one I recommend in the article above: https://www.purerxo.com/thyroidpharmacist/rxo/products/product_details.asp?ProductsID=1885

      Reply

  42. Hi, I’m curious if you have any thoughts on this. Vitamin D supplements make me very tired if taken during the day, so tired I can’t stay awake. But if I take them at night they give me insomnia and light sleep. I’ve been told I need to increase my vitamin D levels, but struggle in winter due to not tolerating supplements. I have tried different brands and formulations.
    Thank you 🙂

    Reply

    • Kaz – thank you so much for reaching out. <3 That is a very interesting question. I haven't seen any papers on this topic yet but I will add it to my research list. I would love to hear more about your experiences here on this page!

      Reply

  43. Izabella, here is an interesting article on vit d , what low means and what low actually is and isn’t. I found it an eye opener. The link to EBV or other resistant viruses is there but the low vit d causation is questioned, being thought to be more correlational… It might be good to suggest to people they have their active d tested as well as a high reading there can signal inflammation and a problem with the vit d receptors rather than a simple lack of D. ..Kind of like the R3 with thyroid sufferers….There are suggestiong for restoring VDR immune function as a way to restore vit d levels to normal…I personally think this issue has been over simplified. I know you have a platform to educate people and would be interested in any new ideas to help. . Thank you..
    https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4160567/

    Reply

    • Cynthia – thank you so much for sharing this information with me! <3 I'm will add it to my research! I hope you will keep me posted on how your thyroid healing journey is going.

      Reply

  44. I have a question. I am prone to kidney stones and have been warned about taking it. Or at least the dosage? what would you recommend, my own family physician isnt sure. I have tried to research it also. Not sure if Im looking in the right place.

    Reply

    • Brenda – thank you for reaching out. One of the best ways to restore optimal vitamin D levels is through sun exposure. I generally recommend beach vacations for those of us living in Northern climates this time of year, but this isn’t always realistic for many and not likely possible during the current shutdown. As such, we have to get sunshine when we can, as well as really focus on food and supplements. We can get vitamin D from dietary sources as well, including wild salmon, cod liver oil, fish, fortified dairy products and orange juice, and eggs. Check out the article above for more tips and here is another article you might find helpful as well: https://thyroidpharmacist.com/articles/new-studies-on-magnesium-and-thyroid-health/

      Reply

  45. Can you explain why some recommend taking K2/ D3 as opposed to D3 only? Thank you for posting this article.

    Reply

    • Becky – thank you for reaching out. <3 Some people with Hashimoto’s may also be deficient in Vitamin K, especially when they have issues with fat malabsorption. Vitamin K deficiency is not routinely tested, but symptoms may include easy bruising, excess bleeding and heavy menstrual periods. Supplementing with vitamin D when one is deficient in vitamin K can have a negative impact on our arteries. Vitamin D supplements liberate calcium from our bodies, and in the case of vitamin K deficiency, the calcium may go to our arteries instead of our bones. Adequate vitamin K can prevent arterial calcification and encourage more calcium into the bones, which is beneficial in osteoporosis, a common condition seen in people with Hashimoto’s. As such, I recommend taking vitamin D with or without added vitamin K, depending on your individual needs.

      Reply

  46. Hello from Ukraine!
    Izabellla, thank you for your work and all the provided information! Your book was a life changing for me! I have found my root cause and managed to decrease my antibodies from 480 to 51.
    I have a question about hypercalcemia caused by Vitamin D… Is there any study that some people do not tolerate normal doses of vitamin D because it causes symptoms of hypercalcemia? I’ve been trying to take vitamin D (1000 IU) and fish oil and also black seeds oil with and without vitamin K and all of that resulted in symptoms of hypercalcemia in a week or in a month of taking it. Within the social groups, I’ve found that I’m not alone with such symptoms… So, I’m wondering if there was some study about that or maybe you know that vitamin D should be avoided due to some reasons, I’d like to know what would be the reasons for that. I also should mention that labs showed that I’m insufficient in Vitamin D, my highest level was 36.
    I would appreciate the answer to that although I understand that there might not be an answer as my issue goes against popular topic of supplementing with vitamin D.

    Reply

    • Lena – thank you so much for sharing our journey. I’m so happy to hear you have been able to reduce your antibodies! <3 As for your question about hypercalcemia, I don’t currently have information to share on that but, I will add it to my list of possible future articles to research. I do hope you will keep me posted on your continued progress.

      Reply

Leave a Reply

Your email address will not be published. Required fields are marked *