Wits & Weights | Evidence-Based Fitness & Nutrition for Lifters Over 40 The Forgotten Thyroid Hormone That Supercharges Fat Loss and Metabolism (Dr. Amie Hornaman) | Ep 424
Jan 9, 2026
Dr. Amie Hornaman, known as the Thyroid Fixer and a specialist in thyroid optimization, takes us on a fascinating journey into the often-overlooked thyroid hormone T2. She explains how T2 can supercharge fat loss, enhance metabolism, and protect muscle without the typical red flags associated with T3. Listen in as she discusses mitochondrial benefits, safe usage of T2, and its role in strength training—especially for those frustrated with stubborn fat. This is a must-listen for anyone keen on optimizing their fitness and nutrition!
AI Snips
Chapters
Transcript
Episode notes
T4 Needs Conversion; T3 Acts Globally
- T4 is inactive and requires conversion to T3, which many factors can disrupt.
- T3 is active and affects all cells, but it can burn muscle if not dosed and managed properly.
Bodybuilders Chose T2 Over T3
- Bodybuilding coaches historically used T2 in contest prep because it spares muscle and doesn't suppress thyroid production.
- Amie recalls trainers avoiding T3 for shows and preferring T2 to protect athletes' muscle and thyroid.
T2 Acts Like An Exercise Mimetic
- T2 promotes thermogenesis, browning of white adipose, and mitochondrial uncoupling similar to exercise.
- It increases ATP production and can act as an 'exercise mimetic' improving insulin sensitivity and liver fat.