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Old 04-19-2015
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Default tsh feedback

the kaplan physio says that it is the the free t4 that has the main negative feed back on the tsh and trh but the u world question explanations say that it is the free t3 that matters.goljan says it is both...
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Old 04-20-2015
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Although the t3 is the active form of the hormone but t4 is responsible for the negative feedback

See this video here Dr.Dunn talks about this


also check this thread


Last edited by CleverFOX; 04-20-2015 at 01:58 AM.
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