AHK-Cu is used as a topical cosmetic ingredient, not an approved medicine. Concentrations below reflect common cosmetic formulation practice and are not a medical dose. There is no regulator-approved therapeutic protocol. This page is education, not a prescription.
Overview
AHK-Cu is a copper-bound tripeptide (a "copper peptide") used mainly in cosmetic serums and creams marketed for skin and hair. Because it is applied to the surface rather than injected, the relevant idea is a concentration in a finished product, not an injection dose.
Common topical use pattern
In cosmetic formulations, the common pattern is:
- Included at a low percentage of the finished serum or cream — copper peptides are typically formulated in roughly the 0.05%–2% range.
- Applied to clean skin or scalp, usually once or twice daily per the product's directions.
- Follow the product label, since the actual amount delivered depends on how the manufacturer formulated it.
These are formulation figures, not a systemic dose. Copper peptides are also sometimes best kept apart from strong exfoliating acids or high-dose vitamin C in the same routine, per common cosmetic guidance.
Why it is used topically
AHK-Cu is intended to act at the skin or follicle where it is applied, which is why it is delivered in leave-on or rinse-off cosmetics rather than reconstituted and injected. Framing borrowed from injectable peptides — vials, units, syringe volumes — does not apply to a topical cosmetic active.
Why oversight matters
Even topical products can irritate skin or interact poorly with other actives, and marketing claims often outrun the evidence. A dermatologist or qualified professional can advise on whether a copper-peptide product suits your skin and how to combine it safely with the rest of a routine.
For a broader overview, see the main AHK-Cu reference page and the safety-focused guide.