scientific studies ghk-cu hair growth Peptide Research: Molecular Mechanisms in Biology ghk-cu hair growth evidence clinical

HGF reduces NMDA-induced neuronal death in cerebellar granule neurons in vitro

Researchers who opt to administer GHK-Cu via injection should note that most side effects observed, including nausea and redness/pain at injection site, more commonly result from the injections than the peptide itself

Carnosine is the more practical, evidence-based, and accessible option -- a naturally occurring dipeptide with extensive human safety data, oral availability, and multi-pathway protective effects against the molecular damage that drives aging

Recent human topical evidence A 2023 IRB-approved 21-woman topical trial of NEEL gel (a stabilized GHK-Cu topical) reported an average 28% increase in skin collagen density at 3 months, with a top quartile reporting 51%