A related came up on another board today: what is the effect of ephedrine on Thyroid? It was posited that "EC stimulates the deiodinase in the liver that converts t-4-> t3"
Seems to me like that would tie into the GH question - if GH causes a dip in T3 levels, and that's part of the "bulking" feature, then if you do anything to increase T3, you'll increase it's fat burning potential. Since T3 is catabolic, I'd think that would also decrease it's muscle building potential.
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