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In a separate head-to-head comparison, GHK-Cu outperformed both retinol (vitamin A) and vitamin C in improving skin firmness and elasticity, and it did so without the irritation, photosensitivity, or adjustment period associated with retinoid use

Competitive athletes should understand that BPC-157 use could result in a doping violation

In research contexts, it is investigated for its roles in skin extracellular matrix (ECM) biology , cellular stress responses , and wound-model dynamics

10.1038/nchembio.2079 150 SoH

Additionally, factors such as stress, an intensive lifestyle, and exposure to various environmental elements may increase the bodys need for nutritional support