long term side effects of ghk cu GHK-Cu (Copper Peptide) works beneath the surface to support GHK-Cu Peptide Therapy: The Definitive

1 Research suggests it may help support collagen and elastin production, promote tissue repair and remodeling, help regulate inflammatory signaling in the skin, support skin barrier integrity, and provide antioxidant activity within the skin

Current Aging Science, 13(1), 4148

Therapeutic peptides in orthopaedics: Applications, pathways, and tissue mechanisms [Review of TB-500 as thymosin beta-4 fragment in preclinical models]

Quinn R

These are not dietary supplements, they are not approved drugs, they are chemicals with no good manufacturing practices (GMP) or quality control testing requirements for identity or contaminants as is required for supplements