








Copper Peptide Hair Tonic with GHK-Cu and Acetyl Tetrapeptide-3
Key Benefits
6 Ingredients or Less. Nothing Hidden.
GHK-Cu. Acetyl Tetrapeptide-3. Water. Glycerin. Phenoxyethanol.
Two clinically studied peptides. Three carriers to deliver them. No fillers, no botanicals, nothing added for marketing appeal.
Visible results typically appear within 6-8 weeks of consistent daily use. Individual results may vary.
Choose options









How to Use PLU Hair Tonic
Clinical-strength peptides in 30 seconds.
No complicated steps, no guesswork.
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.
Key Benefits of Copper Peptides For Hair
Our serum contains GHK-Cu + Acetyl Tetrapeptide-3 at concentrations mirroring published research for visible improvements in hair density appearance and scalp health. Benefits include:
Supports Hair Appearance
GHK-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
Research-Backed Formula
Based on clinical studies examining peptide concentrations and their effects on hair appearance
Ingredients in Our Copper Peptide Hair Serum
There are two main ingredients in our copper peptides for hair:
- GHK-Cu (1%): Copper Tripeptide-1 for scalp and hair appearance
- Acetyl Tetrapeptide-3 (1%): Biomimetic peptide for hair density appearance
Complete list includes water (aqua), glycerin, and phenoxyethanol.
What you aren’t going to find inside the serum includes parabens, sulfates, harsh chemicals, or synthetic fillers. No DHT blockers or hormonal ingredients - just focused peptide technology at clinical concentrations.
What to Expect From Our Copper Peptide Hair Serum
Results typically become visible within 6-8 weeks of consistent daily use:
- Weeks 1-2: Scalp feels healthier, improved overall comfort
- Weeks 3-4: Hair appears shinier and healthier-looking
- Weeks 5-8: Notable improvements in hair density appearance
- Weeks 8+: Continued improvements with consistent daily use
GHK-Cu vs AHK-Cu
| GHK-Cu (This Product) | AHK-Cu | |
|---|---|---|
| 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
Do copper peptides work for hair growth?
Yes. Our GHK-Cu serum is enhanced with Acetyl Tetrapeptide-3 to work through a number of pathways examined in clinical research on scalp health and hair density appearance.
Is copper peptide a DHT blocker?
No. We don’t include any DHT blockers (like Finasteride), either. These types of ingredients can have harmful hormonal effects, and we prefer to support scalp and hair health naturally. Our dual-peptide system may be all you need to unlock your healthiest, happiest hair yet!
Do I apply the serum to my hair or scalp?
Apply it to the scalp directly, not hair strands. The scalp is where hair growth actually takes place. Applying the copper peptide hair serum to strands will just leave you looking greasy without any meaningful impact on hair health. For best results, massage it into the scalp for 30-60 seconds. This may boost circulation and absorption. Focus on trouble areas.
Are copper peptides safe to apply on the scalp?
Yes. Our formulation is free of harsh chemicals, parabens, sulfates, or synthetic fillers. However, we recommend 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.
What are the side effects of copper peptides?
Fortunately, there aren’t really any known side effects of copper peptides for hair. They’re generally considered safe for most people - just like our Matrixyl 3000 serum (copper peptides for skin).
How long does it take for copper peptides to work on hair?
You’ll likely notice a subtle difference in hair appearance and shine within 3-4 weeks of consistent daily use. More significant changes in hair density appearance typically become visible around 6-8 weeks. We encourage you to apply Hair Tonic daily for at least 8-12 weeks.
How often do I need to apply copper peptides for hair?
Once a day is fine. Copper peptide serum requires consistency, though. Do your best to avoid missing a day, or you’re going to delay progress.
Can all hair types benefit from a copper peptide hair serum?
Yes, it’s designed to work across various hair types and textures. The serum supports scalp health and follicle appearance. Customers with straight, wavy, curly, and coily hair have all reported positive results.
Inside the Lab: PLU’s Science & Skincare Insights

Does GHK-Cu Help With Acne? All About GHK-Cu For Acne
Most acne treatments work by attacking your skin. Retinoids peel it, benzoyl peroxide burns through the oil, and salicylic acid eats whatever's clogging your pores. Effective, sure, but your skin p...
Read more
Copper Peptides and Vitamin C: Can You Use Copper Peptides With Vitamin C?
Your morning routine has vitamin C in it. Your new copper peptide serum just arrived. But you read somewhere online that the two cancel each other out - people say copper oxidizes the vitamin C and...
Read more
GHK-Cu and BPC-157 keep showing up in the same peptide conversations, but they have more differences than similarities to be honest. The GHK-Cu vs BPC-157 comparison is less about which one is “bet...
Read more