doi: 10.1016/j.jmb.2019.02.004 103 HeL.LiangJ.ChenC.ChenJ.ShenY.SunS.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)
Use within 14 days, protected from light
As of 2026, injectable GHK-Cu is classified Category 2 by the FDA, restricting it from 503A pharmacy compounding
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