ghk-cu oral bioavailability absorption Is Glycyl-Histidyl-Lysine-Copper (GHK-Cu) absorbed sublingually? Oral Quicksilver Copper GHK: Activate

What follows is the best available reasoning, not proof

Saal D, Dong Y, Bonci A, Malenka RC (2003)

Polym J 43:223241

Multiple clinical trials and controlled studies have demonstrated: Statistically significant improvements in skin firmness and elasticity with consistent use Reduction in fine lines and wrinkle depth over 3-6 months of application Improved skin density, moisture retention, and surface texture Reduction in photodamage and hyperpigmentation Tightening of loose skin documented in both topical and injectable applications Citation: Leyden JJ et al

This is why reading IGF1 findings alongside GHSR and GHR results produces the most actionable picture