Discover the hidden challenges of T4 to T3 conversion that many face even on medication. Learn why free T3 is essential for metabolism and energy, but often overlooked in standard lab results. The 'Rainbow Test' offers a fun way to decode your thyroid lab results and identify issues. Explore common blockers to T3 production and effective lifestyle, dietary, and supplement strategies to support your thyroid health. Plus, hear about a new product designed to naturally enhance T3 levels for better well-being!
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insights INSIGHT
T3's Crucial Role Explained
T3 is the most biologically active thyroid hormone and vital for metabolism, energy, and well-being.
Even normal TSH levels can mask poor T4 to T3 conversion causing persistent hypothyroid symptoms.
volunteer_activism ADVICE
Assessing T3 Conversion
Check your free T3, free T4, and reverse T3 lab values to assess conversion efficiency.
Use the "Rainbow Test" visualization to spot conversion issues by comparing relative T4 and T3 levels.
volunteer_activism ADVICE
Avoid Conversion Blockers
Avoid excessive fasting, low-calorie diets, and over-exercising as these suppress T4 to T3 conversion.
Minimize exposure to environmental toxins like BPA and perchlorate to protect conversion.
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A 90-Day Plan for Reversing Thyroid Symptoms and Getting Your Life Back
Izabella Wentz
In 'Hashimoto’s Protocol', Dr. Izabella Wentz outlines a proven treatment plan that has helped thousands of people with Hashimoto’s disease. The book focuses on lifestyle interventions rather than just medication, including a quick-start two-week detox, support for the liver, adrenal glands, and gut, and personalized plans based on individual triggers. Grounded in the latest science, the book offers hope for remission and provides practical steps, recipes, and supplements to help readers improve their health within 90 days.
In this episode of the Thyroid Pharmacist Healing Conversations podcast, Dr. Izabella Wentz explores one of the most overlooked pieces of thyroid hormone prescriptions: poor T4 to T3 conversion. Despite being on thyroid medication, many people continue to experience fatigue, brain fog, hair loss, and weight struggles because their bodies aren’t converting T4 into the active T3 hormone effectively. Dr. Wentz breaks down why T3 is critical for metabolism, energy, and overall well-being — and what steps can be taken to naturally support the body’s production of this vital hormone.
Listeners will learn how to assess their thyroid labs using Dr. Wentz’s "Rainbow Test," understand the most common root causes of poor conversion, and discover powerful lifestyle, dietary, and supplement-based interventions that can make a real difference. She also shares a brand-new product from her Rootcology line that supports natural T3 production for those unable to tolerate or access T3-containing medications.
What you’ll learn about in this episode:
Why free T3 is so important — and why normal labs don’t always tell the full story. Understanding how to interpret your thyroid labs can reveal conversion problems that are keeping you stuck in fatigue.
The "Rainbow Test" method to visualize your lab results and spot T4 to T3 conversion issues. This simple visual tool can help you decode your results and take empowered action.
Top blockers of T3 production that might be sabotaging your progress. From environmental toxins to excessive fasting, find out what could be slowing you down — and how to shift your T3 production.
How nutrient deficiencies like low ferritin, selenium, and zinc impact your ability to convert T4 to T3. Plus, which forms and dosages actually work without causing side effects.
The role of your liver, gut, and adrenal health in producing T3 naturally. Yes, your conversion isn’t just about your thyroid — it's a whole-body team effort.
What to do if you can’t tolerate or access T3 medications. A new product may offer support for those who want a natural way to enhance T3 levels.
Tune in to learn more about how to naturally support your T3 levels, uncover hidden thyroid symptoms, and feel more energized, clear-headed, and vibrant.
Be sure to subscribe to the Thyroid Pharmacist Healing Conversations podcast so you don’t miss an episode! Sign up for the Thyroid Pharmacist Weekly Thyroid Solutions Newsletter here: https://thyroidpharmacist.com/gift/
For the full list of resources and products mentioned in this episode, and to get the full episode transcript, see complete show notes here: https://thyroidpharmacist.com/articles/podcast/
Thyroid Pharmacist Healing Conversations with Dr. Izabella Wentz 
