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When you get right down to it they all care about each and every last driver
Macrophage studies demonstrate that GHK-Cu administration shifts these cells from a pro-inflammatory M1 phenotype to a tissue-repairing M2 phenotype, increasing their production of growth factors including vascular endothelial growth factor (VEGF) and platelet-derived growth factor (PDGF) by 40-60%
Studies suggest that oral glutathione supplementation results in limited absorption, making it difficult to achieve therapeutic levels through capsules or tablets alone
Dietary intake is significant, particularly in those who follow vegan or vegetarian diets, as B12 is primarily found in animal products
A useful decision framework for GHK-Cu vs retinol for anti-aging starts with tolerability and evidence hierarchy, then layers in individual skin context and specific goals