T4
Concept
An inactive form of thyroid hormone, produced primarily by the thyroid gland, which is converted into the active T3 form in the body.
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Videos Mentioning T4

How to Control Your Metabolism by Thyroid & Growth Hormone
Andrew Huberman
A thyroid hormone, less active than T3, but converted into T3 for metabolic effects.

256 ‒ The endocrine system: exploring thyroid, adrenal, and sex hormones | Peter Attia, M.D.
Peter Attia MD
An inactive form of thyroid hormone, produced primarily by the thyroid gland, which is converted into the active T3 form in the body.