IGF-1 LR3 is a modified insulin-like growth factor-1 construct. IGF-1 LR3 is 120 times more active than normal IGF-1 because it binds poorly to IGF-1-binding proteins. This increases peptide half-life and activity. In addition, myostatin suppression by IGF-1 LR3 boosts cell proliferation, fat metabolism, muscle repair, and hypertrophy. According to recent studies, IGF-1 LR3 may also help mothers nurse.
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