The most-used peptides include copper tripeptide-1 (GHK-Cu) for scalp stimulation, biotinoyl tripeptide-1 and acetyl tetrapeptide-3 for hair follicle signaling, and keratin-derived hydrolyzed peptides for strand strengthening. Each has specific pH stability windows and must be validated during formulation. A qualified cosmetic chemist — findable through the AJ Cosmo Labs app — will confirm compatibility with your full formula.
Read the full guide on private label peptide hair serum manufacturer low moq →