在他的时代,IGF-1被认为是一种非常昂贵和罕见的性能增强剂,尽管一些人声称道里安·耶茨打开了闸门,IGF-1在专业健身领域迅速传播。 Interestingly, while IGF-1 is a potent performance enhancing compound, it is not an anabolic steroid. Instead, IGF-1 is a peptide-or protein hormone-that is structurally...
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