Studies have shown that GHK-Cu at concentrations of 0.01, 1, and 100 nM significantly increased the production of elastin and collagen in human dermal fibroblasts, which are the cells responsible for building skin structure
Efficacy: Clinical studies show copper peptides can achieve similar improvements in collagen production and wrinkle reduction as retinoids, making them a viable alternative for those seeking practical anti-aging effects without the associated irritation
Some users see the reaction begin within days
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BPC-157 BPC-157 is a synthetic 15-amino-acid peptide and a fragment of a protein found naturally in gastric juice, which is why its also referred to as a gastric pentadecapeptide (source)
However, that doesnt mean injections should be used casually or without guidance