ghk-cu benefits skin collagen Peptide for & Hair party tested and 99% purity confirmed by in Neurogan GHK-Cu Copper Peptide Hair

Preventing new hair growth: Once hair follicles have been significantly affected by DHT, they may no longer be able to produce new hair

The reasons: Receptor sensitivity: While GHK-Cu doesn't appear to cause receptor downregulation the way some peptides do, cycling is a general precaution to maintain responsiveness and avoid adaptations that might blunt benefits

Theoretical and reported concerns Off-target cell death: no compound is perfectly selective, so healthy cells with temporarily high FOXO4 could be affected in theory

Every cross-compound number below is therefore a cross-trial inference, not a direct result