Glutathione IV achieves peak plasma concentration within minutes, while oral liposomal glutathione shows effects as early as 1 week at 500-1000 mg daily doses
(2025) This recent study combined copper peptides with microneedling, demonstrating 26.5% hair regrowth
For the skin penetration study, the dorsal skin of each mouse was cleaned using an alcohol pad, and 14 mg of cream containing 0.2% FITC-GHK, FITC-RGD-GHK, or FITC-sOtx2-GHK peptides were smeared uniformly on the skin (1 cm 2 )
Reference Galan, N., RN
Both L-ascorbic acid (Vitamin C) and retinoids thrive in a low-pH (acidic) environment, while GHK-Cu is most stable and effective at a more neutral pH
My honest read for most people walking in for skin and hair is start topical, and add a supervised injectable only when the goal is systemic recovery and after we rule out the reasons someone lands in the group of who should avoid peptides