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man i hate getting those letters lol. feels like the feds are gonna kick the door in any second even though nothing ever happens. i usually say 6 mont...

Honestly i've wondered about this too but most of the data shows that african american guys actually tend to have slightly higher baseline igf-1 level...

never dug deep into ethnic differences for IGF specifically, but lots of endocrinology stuff talks about genetic variation in receptors/metabolism