Wide release: Available for free by July 22, 2026, on Apple, Spotify, YouTube, etc.
Not medical advice.
Nick speaks with Dr. Rahi Sarbaziha about GHK copper, a naturally occurring tripeptide that binds copper and participates in skin wound repair and collagen regeneration. Sarbaziha notes that levels peak in young adulthood before declining, and she outlines how the compound modulates gene expression tied to repair processes in addition to exerting acute effects on oxidative stress. Central concepts include the molecular properties required for topical penetration, distinctions between immediate antioxidant actions and longer-term remodeling, and trade-offs between topical products and injectable administration.
TOPICS DISCUSSED:
Endogenous Decline: GHK-copper levels peak in young adulthood then fall with age, reducing natural support for skin repair and collagen maintenance.
Skin Penetration: Effective topical delivery depends on molecular size under and fat solubility, often improved by procedures such as microneedling that briefly disrupt the barrier.
Mechanisms of Action: The peptide upregulates fibroblasts and vascular endothelial growth factor, stimulates glycosaminoglycan production, and alters expression of genes involved in tissue regeneration and oxidative stress reduction.
Lasting Remodeling: Gene expression changes produce sustained collagen rebuilding that develops over weeks to months rather than delivering only transient effects.
Administration Routes: Topical use is accessible and pairs well with hyaluronic acid for hydration; injectables may reach higher local concentrations but lack extensive human trial data and FDA approval for this purpose.
Safety & Protocols: The compound is generally well tolerated with mild transient injection-site reactions; typical approaches use daily microgram doses for one to two months followed by off periods.
Hair & Other Uses: Clinical observations indicate potential for hair shaft strengthening comparable to minoxidil with a favorable side-effect profile, alongside exploratory work in wound healing and neurological contexts.
Research Needs: Expanded human studies are required to standardize dosing, confirm long-term safety, and evaluate value in neurodegeneration, lung repair, and related areas.
ABOUT THE GUEST: Rahi Sarbaziha, MD is a physician in Beverly Hills, California whose practice focuses on regenerative aesthetics, hormone therapies, peptides, and interventions that support vitality, tissue repair, and overall wellness.
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PRACTICAL TAKEAWAYS:
Select topical GHK copper serums formulated as liposomal or combined with hyaluronic acid to aid absorption and support skin hydration.
Use products for at least four weeks before evaluating changes in texture or fine lines, since collagen remodeling and gene-driven effects require time to appear.
Pair topical application with professional microneedling when feasible to increase delivery into deeper dermal layers where repair activity occurs.
Approach injectable forms cautiously due to absent dosing standardization and regulatory approval; cycle usage under clinician supervision if this route is considered.
SUBSCRIBER CONTENT BELOW: Reference paper + episode transcript.
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