GHK-Cu + AHK-Cu Copper Peptide Hair Density Serum

Your hair doesn't thin overnight. It happens gradually — a wider parting, a thinner ponytail, more on the brush than there used to be. By the time you notice, it's been happening for years.

For most women, the change accelerates in their 40s and 50s. Oestrogen drops. Collagen production slows. The hair growth cycle shortens. And the scalp — the foundation everything grows from — quietly becomes a less hospitable environment for the follicles it's supposed to be feeding.

Most hair serums respond to this with a single ingredient at a low concentration. One mechanism. One angle. Which is why most hair serums disappoint.

The GHK-Cu + AHK-Cu Peptide Hair Density Serum works differently.

GHK-Cu is a naturally occurring copper peptide — one your body produced abundantly at 25 and significantly less of by 50. It works at the scalp level, signalling the tissue to behave like younger, healthier skin. Repairing the environment. Rebuilding the foundation.

AHK-Cu goes further. A synthetic copper peptide engineered specifically to target the hair follicle itself — not the scalp generally, but the dermal papilla cells at the base of each follicle that control whether your hair grows, how thick it grows, and when it stops. In head-to-head studies, AHK-Cu outperformed GHK-Cu on follicle-specific activity by 53%.

Together they work on two different levels simultaneously. GHK-Cu restores the environment. AHK-Cu targets the follicle directly. This is why the combination — not either ingredient alone — is what the hair loss research community keeps returning to.

Supporting them: niacinamide for scalp circulation and inflammation, panax ginseng for DHT moderation, sodium hyaluronate for deep scalp hydration, and a complex of peptides including Tripeptide-1 and Myristoyl Pentapeptide-4 for structural support at the follicle matrix level.

One serum. Applied once daily. Massaged in for 60 seconds.

Most women notice less shedding first — typically within 4 to 6 weeks. Visible improvements in density and thickness follow with continued use. Hair growth is a slow biological process. This formula works with that biology, not against it.

If your hair has changed and you want something built on real science rather than marketing promises — this is where to start.

GHK-Cu (Copper Tripeptide-1)

GHK-Cu is a naturally occurring copper peptide found in the body — but levels drop by more than half between your twenties and sixties. It works by signalling the scalp to behave like younger, healthier tissue, supporting the conditions needed for stronger, fuller-feeling hair. In early studies, GHK-Cu demonstrated hair follicle enlargement comparable to minoxidil — but unlike minoxidil, it works with your scalp's natural biology rather than forcing a response, making it particularly well suited to sensitive or mature scalps. Think of it as restoring what your scalp has quietly been losing for years.

AHK-Cu (Copper Tripeptide-3)

Where GHK-Cu works at the scalp environment level, AHK-Cu goes directly to the source. A synthetic copper peptide engineered specifically to target the dermal papilla cells — the specialised cells at the base of each follicle that control whether your hair grows, how thick it grows, and when it stops. In a head-to-head comparison at Yonsei University, AHK-Cu increased dermal papilla cell proliferation by 53% versus GHK-Cu's 31% — confirming what the hair loss research community has increasingly observed: for follicle-specific activity, AHK-Cu is the more targeted of the two. Combined with GHK-Cu in this formula, you get both levels of action simultaneously — the environment repaired, and the follicle directly stimulated.

Niacinamide (Vitamin B3)

Niacinamide earns its place in this formula on evidence, not trend. It improves scalp microcirculation — increasing blood flow and nutrient delivery to every follicle with each application. It reduces scalp inflammation, which matters because chronic low-grade scalp inflammation is one of the most underacknowledged drivers of hair thinning in women over 40. It also moderates DHT activity at the scalp level — the androgen that shrinks follicles over time and whose rise during perimenopause accelerates female hair loss. Three mechanisms. One well-studied ingredient.

Panax Ginseng Extract

Ginseng has been used in hair care for decades but the mechanism is increasingly well understood. It supports dermal papilla cell proliferation — working in the same direction as AHK-Cu — and has documented DHT-inhibiting properties, helping to address the hormonal driver of hair thinning that most serums ignore entirely. It also improves scalp circulation and has antioxidant properties that protect follicles from oxidative stress. In this formula it acts as the botanical complement to the copper peptides — broadening the formula's coverage without diluting the core science story.

Orders are processed within 1-3 days, with delivery typically taking 4-8 days depending on your location.

Please note that these are estimated delivery times:

• UK: 4 days
• USA: 5 days
• Europe: 5 days
• Canada: 6 days

Step 1 — Part and apply
Section your hair to expose the scalp. Apply a small amount of serum directly to the areas where you notice the most thinning — typically the parting, the crown, and the hairline. A little goes a long way.

Step 2 — Massage for 60 seconds
Use your fingertips to gently massage the serum into your scalp using small circular motions. This isn't optional — massage improves scalp circulation and helps drive the ingredients where they need to go.

Step 3 — Leave it in
No rinsing. No waiting. Style your hair as normal. The serum absorbs quickly and won't leave residue.

When to use
Once daily. Morning or evening — whichever you'll stick to consistently. Consistency matters more than timing.

What to expect
Most women notice reduced shedding first — typically within 4 to 6 weeks. Visible improvements in density and thickness follow with continued use over 3 to 4 months. Hair growth is a slow process. This is a long game worth playing.

Try it risk-free for 30 days. If you aren't satisfied with your results, contact our team at hello@raimora.com for a refund. Your progress is our priority.

Read our full policy here.

As part of our initial launch phase, some orders may arrive in our manufacturing partner’s original packaging while our custom Raimora packaging is being finalised.

Rest assured, the formula inside is exactly the same premium peptide hair treatment shown on our site.