The Biology of Skin Aging
Collagen production declines approximately 1% per year after age 20. After menopause, this decline accelerates. The result over decades is reduced skin thickness, decreased firmness, increased wrinkling, and slower wound healing. Targeting collagen synthesis is the most direct approach to slowing visible skin aging.
GHK-Cu as the Primary Compound
Physicians designing skin-focused peptide protocols typically center on GHK-Cu as the primary compound. Its direct stimulation of fibroblasts — the cells that produce collagen, elastin, and hyaluronic acid — is the most evidence-supported mechanism in therapeutic peptides for skin. Multiple in vitro studies and the landmark 2012 gene expression study provide the scientific foundation.
Supporting Compounds
Some physicians combine GHK-Cu with BPC-157 (oral formulation) for additional collagen support through its VEGF and growth factor pathways. Others include NAD+ for the cellular energy component of collagen synthesis. The specific protocol depends on patient age, skin health assessment, and goals.
What to Expect From a Skin Protocol
A physician-prescribed skin protocol runs 8-12 weeks minimum. Outcome assessment typically involves standardized photography and patient-reported measures of skin texture, firmness, and moisture. Some physicians include dermatological assessment at baseline and follow-up. Results are gradual — not the immediate visible change of injectable fillers, but addressing underlying biology rather than surface appearance.