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In this episode of the Thyroid Pharmacist Healing Conversations podcast, I interviewed Dr. Susan Peirce Thompson, a New York Times bestselling author and expert in the neuroscience of food addiction. We explored a topic that often gets overlooked in the weight loss conversation: what if your struggle with weight isn’t about willpower, but about food addiction?
Dr. Thompson shares her powerful personal journey from drug addiction to food addiction, and how her background in brain and cognitive sciences led her to develop the Bright Line Eating program. What I found especially fascinating is how she explains the biological and neurological drivers behind food cravings, and why some people can moderate certain foods, while others simply can’t. I think this could be a really helpful approach to consider if you’re experiencing hormone- or autoimmune-based weight gain or weight loss resistance.
We also dive into the surprising parallels between Bright Line Eating and GLP-1 medications, and why both approaches can be so effective when it comes to appetite, cravings, and long-term weight loss maintenance.
If you’ve ever felt like you’re “doing everything right” but still struggling with weight management, this episode may offer a completely new lens – and a path forward.
What you’ll learn in this episode:
- Why food addiction is real and can be harder to break than drugs. Dr. Thompson explains how addiction can transfer from substances to food (and many other things, such as work and shopping). She also shares why highly processed foods hijack the same brain pathways, making it incredibly difficult to stop once you start.
- The role of dopamine in cravings, “food noise,” and loss of control. Highly processed foods, especially sugar and flour, create powerful dopamine spikes that rewire the brain, driving persistent cravings and making normal eating feel unsatisfying.
- How to tell if it’s food addiction, not just lack of discipline. From constant thoughts about food to feeling powerless once you start eating, Dr. Thompson outlines the key signs that your brain chemistry, not willpower, may be driving your behavior.
- Why “moderation” doesn’t work for everyone and what to do instead. For some people, having clear, non-negotiable boundaries (“bright lines”) around certain foods can actually create more freedom, reduce cravings, and simplify decisions.
- How the “Bright Line Eating” method compares to GLP-1 medications. Both approaches target hunger, cravings, and appetite regulation, but the “Bright Line Eating” approach works naturally by improving satiety hormones, reducing dopamine overstimulation, and building sustainable habits.
- Three identity shifts needed to maintain weight loss long-term. Lasting results aren’t just about food – they require becoming devoted to your plan, building emotional resilience, and allowing yourself to fully move on from the struggle with food and weight.
Maintain: The 3 Simple Shifts That Turn Temporary Weight Loss Into Lasting Freedom, is a refreshing and empowering guide to the part of weight loss that most programs overlook: keeping the weight off for good. In this book, Dr. Susan Peirce Thompson shares a science-backed approach centered on three powerful identity shifts that help you move beyond dieting and into true food freedom. You’ll gain practical tools to quiet food noise, build emotional resilience, and create a sustainable lifestyle that supports long-term stability, confidence, and peace with food.
Freebies
- Food Addiction Quiz – A quick self-assessment to determine your susceptibility to food addiction.
- Bright Line Eating FREE 2-hour masterclass – A free class which will help you understand cravings, hunger, and how to thrive.
Guest Resources / Connect with Dr. Susan Peirce Thompson
- Bright Line Eating Program – Dr. Thompson’s structured program for addressing food addiction and sustainable weight loss.
- Visit the Bright Line Eating Website
- Visit Dr. Thompson’s Website
- Follow her on Instagram, Facebook, Youtube, Tiktok, X, and LinkedIn
- Preorder her new book – Maintain: The 3 Simple Shifts That Turn Temporary Weight Loss Into Lasting Freedom – Discusses three key identity shifts for long-term weight loss success: being devoted, resourced, and liberated.
Supplements and Medications We Discussed
- GLP-1 Medications – Prescription medications that help regulate appetite, slow digestion, and reduce cravings through hormonal pathways.
Other Tools, Resources, and Key Concepts
- Bright Line Eating Bootcamp – A structured program designed to help individuals reduce cravings, improve satiety, and create sustainable eating habits.
- Adverse Childhood Experiences (ACE) Score – A tool used to assess how early life stress may influence addiction risk.
- Bright Line Eating Food Rules – Includes eliminating sugar and flour and using structured portions to reduce cravings and stabilize appetite.
- “Food Noise” – A concept that refers to the constant mental chatter around food, cravings, and eating that can signal underlying food addiction.
Books and Articles About Mental Health, Thyroid Health, and Weight
- Bright Line Eating – Book by Dr. Susan Peirce Thompson – A neuroscience-based approach to overcoming food addiction.
- Thyroid Symptom Focus: Weight Loss – Podcast episode with Dr. Izabella Wentz
- Why “Healthy’ Diets” Are Making Women Sick (And the Nutrient They’re Missing) – Podcast episode with Drs. Izabella Wentz and Autumn Smith
- Is Gluten the Root Cause of Your Thyroid Condition?
- How to Lose Weight With Hashimoto’s
- Blood Sugar, Hashimoto’s, Ozempic, Metformin and Berberine
- A-Z Symptoms of Thyroid Disease
- Strategies to Overcome Anxiety with Hashimoto’s
- Root Causes of Depression and Hashimoto’s
Get the Full Episode Transcript
Let’s Connect!
- Follow me on Instagram: @izabellawentzpharmd
- Get my FREE weekly thyroid & gut health newsletter: Sign up here
- Subscribe & Review: If you loved this episode, please leave a review on Apple Podcasts or rate it on Spotify!
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 Adrenal Transformation Protocol. Her latest book, IBS: Finding and Treating the Root Cause of Irritable Bowel Syndrome, is now out in the world, and available here!
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About Our Guest
Susan Peirce Thompson, Ph.D., is the New York Times bestselling author of Bright Line Eating, The Official Bright Line Eating Cookbook, Rezoom, and On This Bright Day. She is a faculty member in brain and cognitive sciences at the University of Rochester, a keynote speaker, and serves on the board of the Food Addiction Institute. In 2014, she founded Bright Line Eating, a worldwide movement dedicated to helping people achieve maintenance. Over 115,000 people from more than 100 countries have taken her courses. She lives in Rochester, NY with her husband and three kiddos, and you can find her online at BrightLineEating.com or SusanPeirceThompson.com.
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