Each is a distinct 99% HPLC, research-use-only reference peptide, selected according to the in-vitro model under study
It works and is amazing
The most commonly reported side effects of topical peptide application are mild scalp irritation or redness, which typically resolves within a few days
As noted by Prof
Rollins B, Martin MV, Sequeira PA, Moon EA, Morgan LZ, Watson SJ, et al
Skin Rejuvenation and Anti-Aging Protocol Dose: 1 to 2 mg per day Route: Subcutaneous (abdomen, thigh, or upper arm) Frequency: Daily, 5 days on, 2 days off Cycle: 8 to 12 weeks on, 4 weeks off Expected results: 4 to 8 weeks for visible improvement Best for: Fine lines, skin elasticity, skin density, overall skin quality In a 12-week facial cream study (human trial, 71 women), 70% showed increased collagen production with GHK-Cu, compared to 50% with vitamin C and 40% with retinoic acid (Pickart et al., 2015)