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I evaluate each patients history, goals, and lab work before recommending any peptide protocol
If you had to pick one: GHK-Cu has broader biological reach (roughly 4,000 genes modulated versus 300-500 for retinol) [3] and a higher responder rate for collagen improvement in the only direct comparison
Editorial refresh Practical 2026 note on GHK-Cu vs NAD++ A reader looking up GHK-Cu vs NAD++ is usually choosing between options, not reading for curiosity
doi: 10.1089/aid.1996.12.1537 52 PoggialiE.BastoniD.IoannilliE.VercelliA.MagnacavalloA
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