Anyone showing dramatic wrinkle reversal in one week is either using injectable delivery, a film-forming agent for temporary visual tightening, or misleading photography
Reconstitute with bacteriostatic water (0.9% benzyl alcohol) by gently swirling -- do not vortex
The human peptide GHK stimulates blood vessel and nerve outgrowth, increases collagen, elastin, and glycosaminoglycan synthesis, and supports fibroblast activity in aged skin. Pickart & Margolina, International Journal of Molecular Sciences 2
Zeng K, Tian L, Patel R, Shao W, Song Z, Liu L, Manuel J, Ma X, McGilvray I, Cummins C, Weng J, Jin T (2017) Diet polyphenol curcumin stimulates hepatic Fgf21 production and restores its sensitivity in high-fat-diet-fed male mice
To use it optimally, always discuss it with your treating physician