For researchers building comprehensive peptide protocols, GHK-Cus complementary profile, including blends with BPC-157/TB-500, growth hormone secretagogues, and neuropeptides, positions it as a foundational element rather than a peripheral add-on
A separate trial linked the same GHRH approach to gains in lean body mass, though its approved use stays narrow
BPC-157, or Body Protective Compound 157, is a pentadecapeptidea sequence of 15 amino acids
This is important because the cosmetic companies are citing studies that were using GHK-Cu in isolation and not in combination so the efficacy of the peptide is not known
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