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GHK-Cu Versus BPC-157 BPC-157 and GHK-Cu represent the two most popular regenerative peptides for general tissue repair, though their mechanisms and primary applications differ substantially

Published research on GHK-Cu's broad gene expression effects and anti-inflammatory actions suggests potential indirect benefits for hair through systemic mechanisms reduced inflammatory signaling, improved tissue remodeling capacity, enhanced antioxidant defense (Pickart et al., 2018)

The science backing this up is compelling

These issues might explain why some studies find no change in blood glutathione levels with supplementation