W wilson6 Elite Mentor Jun 24, 2002 #3 It might as a secondary response to increased circulating estrogen, but increasing circulating IGF-I isn't going to do much to build muscle. It's what is happening in the muscle that counts and that's more a function of testosterone. W6
It might as a secondary response to increased circulating estrogen, but increasing circulating IGF-I isn't going to do much to build muscle. It's what is happening in the muscle that counts and that's more a function of testosterone. W6
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