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In this episode of Thyroid Pharmacist Healing Conversations, I’m joined by Mike Feldstein, founder of Jaspr and a leading voice in indoor air science. Mike’s path to this work began in wildfire restoration and mold remediation, where he saw how smoke, toxins, and water damage continued to make people sick long after the visible damage was gone. Those experiences, coupled with his own child’s health struggles, fueled his mission to bring commercial-grade “air scrubbing” technology into homes, schools, and clinics.
Together, we unpack how the air inside your home may be undermining your health in ways you can’t always see or smell. Mike explains how modern building practices, sealed windows, and off-gassing materials have created the perfect storm for “sick buildings,” and why conventional purifiers often aren’t enough. We also dive into the overlooked everyday exposures, from fragrances and cleaning products to HVAC design and even diaper pails, that quietly build up in your indoor environment.
Mike shares practical, empowering solutions to help you become more empowered with your health, including how to choose the right scale of air purification, simple changes that can dramatically improve sleep and energy, and why clean air deserves a place alongside clean food and clean water as a pillar of healing. Whether you’re looking to reduce airborne toxins that could be contributing to thyroid symptoms, looking at ways to reduce asthma or allergies, or simply create a healthier sanctuary for your family, this episode is a must-listen!
What you’ll learn in this episode
- Why indoor air is often more polluted than outdoor air: Unlike outdoor environments where wind, sunlight, and rain naturally cleanse toxins, our homes trap mold, VOCs, and bacteria inside. As a result, indoor air can be 5 to 10 times dirtier than the air outside, driving brain fog, fatigue, allergies, and asthma. Targeted changes like daily ventilation, high-efficiency air scrubbers, and simple monitors can transform your environment into one that supports healing instead of undermining it.
- How “sick building syndrome” affects your health: The energy-efficient buildings that started to be built in the 1970s seal in mold, chemicals, and poor ventilation. This hidden trade-off explains why so many people feel unwell in their own homes and workplaces.
- Why size and scale matter in air purification: Small, store-bought purifiers often work like golf carts – fine for light use, but not built for real health demands. Air scrubbers operate more like SUVs, moving far more air through larger filters and reducing pollutants on a much bigger scale. Choosing the right “vehicle” for your space can mean the difference between slightly cleaner air and truly life-changing results.
- Everyday toxins may be hiding in your home: Furniture, flooring, cleaning products, fragrances, and even diaper pails can release chemicals that linger in the air. These daily exposures add up, and clearing them can relieve symptoms you may not have connected to your environment.
- Air scrubbers vs. basic purifiers: Store-bought purifiers may only improve air quality by 10 to 20%, while air scrubbers like Jaspr can reduce pollutants by up to 99%. That level of clean air can be life-changing for those with asthma, autoimmunity, or chronic sleep issues.
- Clean air as a missing pillar of functional medicine: Just as water filtration and clean diets are now common practice, air quality deserves the same attention. Without it, even the best supplements and protocols may fall short of lasting results.
Guest Resources / Connect with Mike Feldstein
- Jaspr Air Scrubber – Consider this high-efficiency, commercial-grade device designed to “scrub” the air in bedrooms, classrooms, and living spaces, removing particulates, VOCs, mold spores, and bioaerosols far more effectively than standard purifiers. (Use code IZABELLA for $300 off your purchase through October 22nd, or $200 off ongoing.)
- Learn more about Jaspr products at their website
- Follow Mike/Jaspr on Instagram and Facebook
- Learn more about Kindling Academy (the healthy school project founded by Mike)
Supplements We Discussed
- Magnesium – Supports muscle relaxation and restful sleep, which can be disrupted by poor air quality, mold exposure, or nighttime coughing. Consider Rootcology Magnesium Citrate Powder.
- N-Acetylcysteine (NAC) – A precursor to glutathione that helps the body neutralize oxidative stress from pollutants and supports lung health by thinning mucus. Consider Rootcology Pure N-Acetyl Cysteine.
- Quercetin – A natural flavonoid that stabilizes mast cells and reduces histamine release, easing allergy symptoms triggered by airborne allergens.
- Vitamin C – A potent antioxidant that helps buffer the immune system against environmental toxins and supports recovery during times of stress or illness.
- Binders (like activated charcoal) – Can be used to trap and remove mold toxins or other environmental chemicals once mobilized, supporting the body’s detox pathways.
Other Tools and Resources
- Corsi–Rosenthal Box (DIY Air Filter) – A budget-friendly option made with box fans and HEPA filters that can substantially reduce particulate matter, especially during wildfire season.
- Aranet CO₂ Monitor – Helps track indoor carbon dioxide levels so you know when to open windows or ventilate, ensuring healthier airflow inside your home.
- Awair Element Air Monitor – Tracks pollutants like VOCs, particulate matter, and humidity, providing real-time feedback on your air quality and showing patterns over time.
- ERV/HRV Ventilation Systems – Energy-efficient mechanical systems that bring fresh outdoor air into the home while maintaining indoor climate control, especially useful in airtight houses.
- Non-toxic cleaning products (e.g., Branch Basics, vinegar solutions) – Reduce the chemical burden in the home and prevent off-gassing that contributes to poor indoor air quality. (Use code IZABELLAWENTZ for 15% off all Branch Basics Starter Kits.)
- Healthier diaper pail – Airtight designs prevent airborne bacteria from building up in nurseries, reducing one of the most overlooked sources of indoor contamination.
- Building Biology Institute – Learn more about building biology and Healthy Home Builders.
Books and Articles About Thyroid Health
- Studies on Magnesium and Thyroid Health
- NAC for Immune Health, Detoxification and Gut Health
- Air Quality and Hashimoto’s – Is the Air You’re Breathing Making You Sick?
- How Supporting the Liver Is Key to Recovering from Thyroid Disease
- 9 Sneaky Thyroid Toxins Hiding in Your Home
- The Thyroid and Formaldehyde Connection
- Mold: A Potential Trigger of Hashimoto’s
Get the Full Episode Transcript
Let’s Connect!
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Got questions? Drop them in the comments! 🙂
About Our Host
Dr. Izabella Wentz
Dr. Izabella Wentz is a compassionate, innovative, solution-focused integrative pharmacist dedicated to finding the root causes of chronic health conditions. Her passion stems from her own diagnosis of Hashimoto’s thyroiditis in 2009, following a decade of debilitating symptoms.
Dr. Izabella Wentz has written several best-selling books, including the New York Times bestseller Hashimoto’s Thyroiditis: Lifestyle Interventions for Finding and Treating the Root Cause, the protocol-based #1 New York Times bestseller Hashimoto’s Protocol: A 90-Day Plan for Reversing Thyroid Symptoms and Getting Your Life Back, the Wall Street Journal bestseller Hashimoto’s Food Pharmacology: Nutrition Protocols and Healing Recipes to Take Charge of Your Thyroid Health, and her latest book, Adrenal Transformation Protocol.
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About Our Guest
Mike Feldstein is the founder of Jaspr and an air quality expert. With a background in wildfire restoration, air quality consulting, and home remediation during some of the biggest natural disasters, Mike started Jaspr to innovate in air science and technology. His goal is to protect air quality and improve human health using the latest air quality science.
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