Thyroid complexity decoded — The Peter Attia Drive Podcast (6‑min summary)
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Hook: The thyroid isn’t a simple on/off gland—tissue-specific T3 activation and deiodinases reshape diagnosis and care. Original: 3 hours • Summary: 6 minutes. In this condensed episode, host Peter Attia and guest Antonio Bianco unpack how T4-to-T3 conversion, deiodinase enzymes (D1, D2, D3), and reverse T3 create tissue-level thyroid states that blood tests often miss. Learn why TSH and free T4 are useful but limited, when mass‑spec T3 or antibody testing matters, and how age, fasting, and illness alter thyroid physiology. Practical takeaways cover diagnosing subclinical hypothyroidism, interpreting discordant labs, autoimmune (Hashimoto’s) considerations, and treatment choices—from levothyroxine to combination T4/T3 and desiccated thyroid—plus the need for reliable slow‑release T3 and better assays. Keywords: thyroid, hypothyroidism, TSH, T3, reverse T3, deiodinase, levothyroxine. Listen now to get the key ideas in minutes.
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