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Unlike native IGF-1, which is rapidly bound and regulated by IGFBPs in circulation, IGF-1 LR3 was engineered to remain active longer, making it a useful tool for researchers studying sustained IGF-1 receptor signaling rather than the brief signaling windows native IGF-1 typically produces
Safety data is similarly limited, with the tolerability of creams and long-term effects sparsely analyzed in the literature
GHK-Cu hair peptide boosts levels of collagen in the scalp
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