Copper Peptide Hair Tonic with AHK-Cu and Acetyl Tetrapeptide-3
Key Benefits
Nourish Your Hair With AHK-Cu Peptide
AHK-Cu peptide is a synthetic copper peptide (Copper Tripeptide-3) made to support the appearance of fuller-looking hair. Our copper peptide serum pairs it at 1% concentration with 1% Acetyl Tetrapeptide-3.
Two clinically studied peptides, five total ingredients. No botanicals or fillers. Nothing added for marketing appeal. Most serums dilute their active compounds across 20 or 30 other components. We went the opposite direction and made a product with everything you need, and nothing you don't.
Bring out the full potential of your hair by making this serum a part of your routine.
Ships within the United States. Coming soon on Amazon.com
Choose options
- WaterCarrier
- GlycerinCarrier
- AHK-Cu 1%Copper Tripeptide-3, for scalp and hair appearance
- Acetyl Tetrapeptide-3 1%Biomimetic peptide, for hair density appearance
- PhenoxyethanolPreservative
Full ingredients (INCI): Water, Glycerin, Copper Tripeptide-3, Acetyl Tetrapeptide-3, Phenoxyethanol
Our AHK-Cu hair serum vs a leading competitor
That's it.
Simple by design.
Two working peptides, a few carriers, and nothing added for the label. That's the whole product.
Five ingredients, no filler
AHK-Cu, Acetyl Tetrapeptide-3, water, glycerin, phenoxyethanol. You can read every one.
Nothing hidden
No hyaluronic acid, vitamin C, or botanical filler. Layer those yourself if you want them.
Made in the USA, 30-day returns
Formulated and produced domestically, backed by a 30-day money-back guarantee.
What is AHK-Cu?
AHK-Cu (Copper Tripeptide-3) is a synthetic variant of GHK-Cu. Both are copper peptides, but AHK-Cu swaps glycine for alanine in its amino acid chain (alanine-histidine-lysine vs glycine-histidine-lysine). Research on AHK-Cu has focused primarily on hair follicle applications.
We offer both GHK-Cu and AHK-Cu Hair Tonics so you can choose based on your preference. Same dual-peptide formula, same concentrations, same carrier system. The only difference is which copper peptide variant is used. Read our full AHK-Cu vs GHK-Cu comparison.
Supports Hair Appearance
AHK-Cu copper peptide supports scalp's natural processes for fuller-looking hair and improved density appearance
Enhances Hair Look
Acetyl Tetrapeptide-3 helps improve how hair appears with consistent use and follicle support
Scalp Health Support
Designed to help maintain healthy-looking scalp conditions and follicle appearance
Concentrations That Matter
Peptide concentrations formulated to match published research on hair appearance
What Can AHK Peptide Do For Your Hair and Skin?
The AHK peptide can be a powerful form of support for hair follicles. Studies suggest that AHK-Cu peptide may help promote the appearance of thicker, fuller-looking hair (when applied at clinical concentrations over time). The Acetyl Tetrapeptide-3 in our formula complements it. Most people see visible changes within 6-8 weeks of consistent daily use.
Some people also apply copper peptides for skin. AHK-Cu has early research interest there, but there’s just not as much data on that angle compared to GHK-Cu - which has decades of peer-reviewed study. Our GHK-Cu serum is the better fit for skin support. It pairs 1% GHK-Cu with Palmitoyl Tripeptide-1 and Palmitoyl Tetrapeptide-7. AHK peptide is built for your scalp.
Application Steps
1 Part
Works on dry or damp hair. Create sections to expose scalp.
2 Apply
Dispense directly onto scalp. Use fingertips to massage into areas of concern
3 Leave In
Do not rinse. Style hair as usual. Use morning and/or night.
What to Expect From Our Copper Peptide Hair Serum
Weeks 1-2
Scalp feels healthier with improved comfort
Weeks 3-4
Hair appears smoother with improved shine and less shedding
Weeks 6-8
Visible improvements in hair density and scalp health
Weeks 8-12
Hair appears noticeably thicker and fuller
Weeks 12+
Ongoing support for fuller, denser hair with daily use
Individual results may vary. Research on copper peptides, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7, and Acetyl Tetrapeptide-3 noted visible improvements within study timeframes with consistent use of peptide complexes.
AHK-Cu vs GHK-Cu
| GHK-Cu | AHK-Cu (This Product) | |
|---|---|---|
| Full Name | Copper Tripeptide-1 | Copper Tripeptide-3 |
| Amino Acids | Glycine, Histidine, Lysine | Alanine, Histidine, Lysine |
| Occurs Naturally | Yes (human plasma) | No (synthetic variant) |
| Research Focus | Skin + Hair | Primarily Hair |
| PLU Product | GHK-Cu Hair Tonic | AHK-Cu Hair Tonic |
Frequently Asked Questions
Is AHK-Cu better than GHK-Cu?
Not better, just different. Both are copper peptides with the same histidine-lysine-copper structure. AHK-Cu (Copper Tripeptide-3) swaps glycine for alanine in the amino acid chain. GHK-Cu occurs naturally in human plasma and has decades of research across skin and hair. AHK-Cu is a synthetic variant with research focused primarily on hair follicle applications. We carry both here at PLU Laboratories, and you can always read our full AHK-Cu vs GHK-Cu comparison if you want to learn more.
What are the benefits of AHK-Cu?
Research suggests it may help support the appearance of hair density and fullness when applied consistently. Our formula uses 1% AHK-Cu paired with 1% Acetyl Tetrapeptide-3 at clinical concentrations. Five ingredients total, with visible changes showing up within 6-8 weeks.
Is it safe to use AHK-Cu for hair?
Yes. Our formulation is free of harsh chemicals, parabens, sulfates, or synthetic fillers. It's probably still worth patch testing on a small area first, as with any new scalp product. You may want to consult with a dermatologist before use if you have specific scalp concerns, too. However, there aren't really any known side effects so you can apply with peace of mind.
Where can I buy AHK-Cu peptide?
Right here at PLU Laboratories. Our AHK-Cu Hair Tonic comes in a 10 mL discovery size ($59.99) and a 30 mL full size ($119.99). We also carry copper peptides for hair in GHK-Cu formulations if you want to compare. Get free shipping on every order.
How do I use AHK peptide?
Apply it directly to the scalp (not hair strands) since that’s where hair growth actually takes place. Applying the copper peptide hair serum to strands will just leave you looking greasy without any actual impact on hair health. Massage it into the scalp for 30-60 seconds for best results. This may boost circulation and absorption. Focus on trouble areas.
From the PLU blog
What Not to Mix With Copper Peptides
Copper peptides can work wonders for your skin and hair, but only if you let them work their magic without anything else getting in the way. Knowing what NOT to mix with copper peptides is just as ...
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AHK-Cu Benefits: 4 Reasons to Add This Copper Peptide to Your Hair Care Ritual
Whether you're dealing with thinning hair or you just want to support your scalp, you need to know about the AHK-Cu benefits. This copper peptide may not get as much hype as GHK-Cu, but it belongs ...
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GHK-Cu Peptide Cost: How Much is GHK-Cu Peptide?
It's no secret GHK-Cu can do some amazing things for your skin. But how much is GHK-Cu peptide, and more importantly, is it really worth adding to your regimen? The GHK-Cu peptide cost depends on h...
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