How long does AHK-Cu take to work?
In the first week of AHK-Cu, nothing visible yet. Around week 4, scalp irritation should fade if it appeared early. By week 8, subtle follicle changes for responders. Most users see less than topical minoxidil produces. Response varies between people, this is the commonly reported pattern, not a guarantee.
Week by week
- Week 1: Nothing visible yet.
- Week 4: Scalp irritation should fade if it appeared early.
- Week 8: Subtle follicle changes for responders. Most users see less than topical minoxidil produces.
References
- The effect of tripeptide-copper complex on human hair growth in vitro — Pyo HK, Yoo HG, Won CH, Lee SH, Kang YJ, Eun HC, Cho KH, Kim KH — Archives of Pharmacal Research, 2007;30(7):834-9
Pepdex is an editorial reference, not medical advice. Peptides vary in legal and approval status by country, many are research compounds without full human safety data. Talk to a qualified clinician before starting anything.
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Last updated 2026-06-06.