AHK-Cu (Copper Tripeptide-3) is a copper peptide used in scalp and hair products to support the appearance of thicker, healthier-looking hair.
- INCI name
- Copper Tripeptide-3
- Also called
- Copper Tripeptide-3, AHK copper peptide
- Category
- Copper peptide
- In these formulas
- Grow With The Flo
What is AHK-Cu?
- AHK-Cu is a close cousin of GHK-Cu, studied specifically in the context of hair and scalp appearance.
- Grow With The Flo pairs AHK-Cu with GHK-Cu, caffeine, ginseng root and hydrolysed rice protein.
- It is a leave-on cosmetic scalp serum, not a medicated hair-loss treatment.
What does the research cover?
- Copper peptides are studied for follicle-environment and hair-appearance endpoints.
- Scalp routines are slow: 8–12 weeks of daily use is the realistic assessment window.
- Caffeine is included as a supporting scalp-stimulating cosmetic ingredient.
Who is AHK-Cu best for?
- A hairline or part that looks wider than it used to
- Fine hair that flattens quickly
- Anyone who wants a leave-on scalp step that does not weigh hair down
How do you use AHK-Cu?
- Apply a few drops directly to the scalp and hairline once or twice daily.
- Massage in and leave on — no rinsing, wet or dry hair.
- Keep going for 8–12 weeks; take a photo on day one for comparison.
What does it pair with?
- Caffeine
- Panthenol
- Hydrolysed rice protein
What should you avoid layering with it?
- Applying immediately before heat styling at high temperatures.
AHK-Cu questions
How often should I use a copper peptide hair serum?
Once or twice daily on the scalp, left on. Consistency across 8–12 weeks matters far more than how much you use per application.
Can I use it on coloured hair?
Yes — it is a leave-on scalp serum suitable for all hair and scalp types, and it won't weigh hair down.