ghk-cu inhibits 5-alpha reductase Understanding Inhibitors GHK-Cu for Hair Follicle Activation:

[13] [19] Specifically, the function of GSTs in this role is twofold: to bind both the substrate at the enzyme's hydrophobic H -site and GSH at the adjacent, hydrophilic G-site, which together form the active site of the enzyme

DSIP is not an approved medicine

Structural Maintenance: From joints to skin, maintaining extracellular integrity under physical stress is a long-game play relevant to athletes, regular lifters, and active adults alike

And it's been mindlessly applied to a peptide with completely different pharmacokinetics

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On the other hand, use of a hydrophobic solvent (e.g., benzyl benzoate) provides a less viscous depot