What Patients Report Patients using GHK-Cu for skin, hair, and healing frequently report real improvements in cellular turnover, collagen production, and tissue repair increased skin density, slowed hair shedding, and faster recovery, with many noticing significant changes over about a 12-week period. John Comandari, Beyond Stem Cells That roughly three-month window is a useful benchmark
Individual experiences may vary
Nature 444, 323329
For patients in South Florida, the heat outside the refrigerator is an especially important factor: a peptide vial left on a counter in a Doral kitchen during summer is exposed to ambient temperatures that can reach the mid-80s Fahrenheit or higher, which meaningfully accelerates degradation for any reconstituted solution left out during injection preparation
FDA's 2024 review states the mechanism of action is still unknown, which limits how confidently any specific physiological effect can be predicted in humans