“Noticeably fuller”
My hair looks noticeably fuller, and my scalp feels healthier overall. It's lightweight, easy to use, and I actually look forward to applying it.
Verified buyer
Copper Peptide Hair Tonic with GHK-Cu and Acetyl Tetrapeptide-3
Key Benefits
Supports Hair Density Appearance
Enhances Hair Look
Supports Scalp Health
Best for: a first trial to see how the tonic fits your routine. We recommend the Full Size for ongoing daily use. Early changes typically start after 6 to 8 weeks and keep building with consistent use.
Full SizeBest for: making the tonic part of your daily routine, and the best value per day. Early changes typically start to show after 6 to 8 weeks of daily use and build with consistent use.
Discovery SizeBest for: a first trial to see how the tonic fits your routine. We recommend the Full Size for ongoing daily use. Early changes typically start after 6 to 8 weeks and keep building with consistent use.
Choose your plan
Most popular · Save 15% on every order
- Free shipping on every order
- Pause, skip, or cancel anytime
- 30-day returns
Deliver every
9
weeks
Heads up: at this interval you may run out before your next bottle arrives, based on typical daily use.
New to PLU? Use code START10 at checkout for 25% off your first subscription order.
Most popular · Save 15% on every order
- Free shipping on every order
- Pause, skip, or cancel anytime
- 30-day returns
Deliver every
3
weeks
Heads up: at this interval you may run out before your next bottle arrives, based on typical daily use.
New to PLU? Use code START10 at checkout for 25% off your first subscription order.
Who this is for
- You've noticed thinning, a widening part, or a hairline starting to recede, and you want to act on it early.
- You want a simple five-ingredient formula with no DHT blockers, hormones, or fragrance.
- You can commit to once-a-day use and give it a few months. Early changes typically start around 6 to 8 weeks and build from there.
Who this isn't for
- You're expecting visible change in under 6 weeks. Peptides work gradually.
- You're looking for a one-bottle fix. Results come from consistent daily use over months, not a single bottle.
- You want a DHT blocker or a minoxidil alternative. This is neither. It's a scalp-support formula. Ask your dermatologist about using it alongside a treatment.
Third-Party Lab Verified
Made in the USA
Just 5 Ingredients
Never Tested on Animals
Made in the USA of domestic and internationally sourced components.
Just 5 ingredients.
GHK-Cu. Acetyl Tetrapeptide-3. Water. Glycerin. Phenoxyethanol.
Two clinically studied peptides. Two carriers to deliver them. A gentle preservative. No fragrance, no dyes, no botanical extracts. Both peptides verified at 1% by LC-MS in the finished bottle, at or above label claim, at the University of Illinois at Chicago.
Visible results typically appear within 6-8 weeks of consistent daily use. Individual results may vary.
Ships within the United States. Also available on Amazon.com
GHK-Cu | Copper Peptide Hair Tonic for Fuller-Looking Hair
Sale price$39.99
Choose options
GHK-Cu | Copper Peptide Hair Tonic for Fuller-Looking Hair
Sale price$39.99
Best for: a first trial to see how the tonic fits your routine. We recommend the Full Size for ongoing daily use. Early changes typically start after 6 to 8 weeks and keep building with consistent use.
Independently Tested
Third-Party Lab Verified
Every formula is tested by the Mass Spectrometry Core at the University of Illinois at Chicago. Actives verified by LC-MS in the finished bottle, at or above label claim. Heavy metals screened by ICP-MS. Reports published.
Concentration (LC-MS)
Purity
Heavy Metals (ICP-MS)
See latest test results +
0
ingredients
0
peptide actives
0/5
verified review average
0s
once-a-day routine
Real customers, real routines
Verified reviews from PLU customers
Five ingredients. Independently verified.
Every batch is third-party tested, and the report is published right on this page.
“Doesn't weigh my hair down”
Easy to apply, doesn't weigh down my hair or make it look oily.
Verified buyer
“Healthier and fuller”
I can already feel my hair getting healthier and fuller.
Verified buyer
“The science to back it up”
This serum is outstanding, and it has the science to back it up.
Verified buyer
Treat the scalp, not just the hair
The scalp is skin. Fuller-looking hair starts with the skin it grows from.
Thousands of orders shipped
Made in the USA. 30-day returns, even if you've opened it.
T
I didn't really see a difference at first, but after using it for some time I see small changes. The hair on the crown of my head seems to be getting fuller and more lengthy. I am sure with continuous use it will prove to be worth it.
A
I received this product four weeks ago and have been using it once in the morning and once at night. I have started to see some hair growth in certain areas.
Debbie,
Great to hear you're seeing early results! Keep us posted with progress.
Best,
The PLU Laboratories Team
L
This stuff is incredible. I used on my eyebrows and after two months they are noticably thicker and fuller. Hair tonic works better than anything I’ve tried in the past.
Lourdes, thanks for the kind review! We're glad our product helped you.
Cheers,
The PLU Laboratories Team
A
Only a couple weeks in, so far so good. Stops that “burning scalp” feeling the second it hits your skin
EDIT:
Compare March 25th to today (May 7th) loooks like some density improvement. We’ll keeping and see how it goes !
Great to hear our product has helped! Keep us posted on your progress.
Cheers,
Rob
A
Easy to apply, doesn't weigh down my hair or make it look oily. I've only used it a couple weeks, so too early to know if it's helping, but I am shedding less!
Gina, thanks for the review! Keep us posted on your results!
A
I see visible increase in density of hair on the portion of the top of my head after 1 month application of GHK-Cu. This area was not seeing any effects after months of using Musely and HappyHead solutions though other areas on the periphery of the head were seeing growth.
See the before and after pics.
Fantastic results, Sujoy! Thanks for sharing with us.
S
I am seeing some results now. Very happy so far
Steve,
Thrilled to hear you're seeing results! Keep us posted on your progress.
Best,
The PLU Laboratories Team
J
I absolutely love this tonic! I’ve been using it consistently on my scalp, especially through my crown area, and I’m so happy I added it to my routine. It’s incredibly easy to use, lightweight, and doesn’t leave my hair feeling greasy or weighed down. I’m really encouraged by what I’m seeing so far and will definitely continue using it. Five stars from me!
Joy, thanks so much for the review, we're thrilled to hear you're seeing good early results. Please keep us posted on your journey!
Cheers,
The PLU Laboratories Team
B
Good product .
Thank you, Barry! We're glad you enjoyed our product!
Best,
The PLU Laboratories Team
R
So far I have no complaints have been using for a few weeks and starting to see some baby hairs.. So all in all its doing something..
Robert,
Great to hear! Let's see those baby hairs grow!
Keep us posted on your progress.
Best,
The PLU Laboratories Team
A
Waiste of money
Nathan,
We're sorry to hear you didn't feel our product was a good value. We've reached out via email to see if there's anything we can do to help!
Cheers,
The PLU Laboratories Team
A
This serum is outstanding, and it has the science to back it up. I highly recommend it to someone with thinning hair.
Mike, thanks for your review! Glad to hear you love the product.
J
Been working great, slow and steady growth!
Thanks, Jeremy! We're glad to hear you've seen steady results
M
This hair tonic doesn’t leave any residue or mess like minoxidil does. Even though I’ve only used it for about a month, I can already feel my hair getting healthier and fuller.
Great to hear, Max! Thanks for being a customer.
R
I've always had trouble growing facial hair and decided to try this product on my mustache for Movember. By the end of the month I had a full looking mustache that received many compliments. I give it 5 stars, my girlfriend gives it 6.
We're glad we could help you get the mustache you always dreamed of, Robert!
C
I’ve been using this for a few weeks and I’m honestly impressed. My hair looks noticeably fuller, and my scalp feels healthier overall. It’s lightweight, easy to use, and I actually look forward to applying it. Really happy with the results so far.
W
I purchased the tonic to improve hair growth and to counteract thinning near the top of my head. Since then, I have visibly improved coverage, materially less shedding, and an excess of confidence. My old lady even noticed and questioned if my stylist had tried something new!! I am obligated to recommend this to those seeking a solution.
The actives
Two peptides. One job.
GHK-Cu supports the scalp's natural processes for fuller-looking hair. Acetyl Tetrapeptide-3 supports follicles and how hair appears with consistent use. Both verified at 1%.
The formula
Everything you need. Nothing you don't.
No DHT blockers. No hormonal ingredients. No parabens, sulfates, or fragrance. Both peptides verified at 1% by an independent university lab.
The routine
30 seconds. Once a day.
Part your hair. Apply 2-3 drops directly to the scalp. Leave in and style as usual.
What you're putting on your scalp
Five ingredients, each with a job.
Two peptide actives at 1% each, and three ingredients to carry them and keep them stable.
5
-
1%Peptide active
GHK-Cu Copper Tripeptide-1
The copper peptide studied in skincare for decades, here for the look of your scalp and hair. More on this CloseIt is the same peptide people buy for their face. We put it where the hair starts instead, at a full 1%, and the concentration is confirmed by an outside lab.
-
1%Peptide active
Acetyl Tetrapeptide-3
A biomimetic peptide, included for the appearance of hair density. More on this CloseIt sits at the same 1% as the GHK-Cu, so neither active is a dusting on the label.
-
Water
The base. Water based, so nothing sits on the scalp. More on this CloseNo oils and no silicones, which is why it absorbs in seconds and leaves nothing to rinse out.
-
Glycerin
A humectant. It carries the peptides and helps the scalp hold on to moisture. More on this CloseIt is the reason two or three drops spread across the part without leaving a film on the hair.
-
Phenoxyethanol
A gentle preservative, so what is in the bottle stays safe to use. More on this CloseOne preservative at a low level, the standard choice for water based cosmetics.
Ingredients (INCI)
Water, Glycerin, Copper Tripeptide-1, Acetyl Tetrapeptide-3, Phenoxyethanol
Independently verified. See the test results.What is not in it
- No fragrance
- No dyes
- No hormones
- No DHT-blocker gimmicks
- No botanical extracts
Expected Progress
What to Expect From Our Copper Peptide Hair Serum
1-2
Weeks 1-2
Scalp feels healthier with improved comfort
3-4
Weeks 3-4
Hair appears smoother with improved shine and less shedding
6-8
Weeks 6-8
Visible improvements in hair density and scalp health
8-12
Weeks 8-12
Hair appears noticeably thicker and fuller
12+
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.
Why PLU
Verified, not claimed.
Just 5 ingredients. And a lab report to prove it.
Six ingredients or fewer
Two peptides, two carriers, one preservative. Every one earns its place.
Tested in the finished bottle
1% GHK-Cu and 1% Acetyl Tetrapeptide-3 verified by LC-MS at the University of Illinois at Chicago, at or above label claim. Heavy metals screened by ICP-MS.
Read the lab reportsMade in the USA, 30-day returns
Formulated and produced domestically, with 30-day returns.
How to Use PLU Hair Tonic
Effective 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.
Our copper peptide hair serum vs a leading competitor
A Leading Competitor | Copper Peptide Hair Product
0
ingredients
PLU Laboratories | GHK-Cu Hair Tonic
0
ingredients
That's it.
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
Concentrations That Matter
Peptide concentrations formulated to match published research on hair appearance
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 |
Who Is This For?
This is for you if...
- You've noticed thinning, a widening part, or a hairline starting to recede, and you want to act on it early.
- You want a simple five-ingredient formula with no DHT blockers, hormones, or fragrance.
- You can commit to once-a-day use and give it a few months. Early changes typically start around 6 to 8 weeks and build from there.
This isn't for you if...
- You're expecting visible change in under 6 weeks. Peptides work gradually.
- You're looking for a one-bottle fix. Results come from consistent daily use over months, not a single bottle.
- You want a DHT blocker or a minoxidil alternative. This is neither. It's a scalp-support formula. Ask your dermatologist about using it alongside a treatment.
Frequently Asked Questions
What does the research on copper peptides say about hair?
Copper peptides are among the most studied peptides in cosmetic science. Published research on GHK-Cu and Acetyl Tetrapeptide-3 has looked at scalp health and the appearance of hair density. PLU Laboratories makes cosmetic products, not drugs, so we do not make hair-growth claims.
Our Hair Tonic pairs both peptides at the 1% concentrations studied in that literature. Read the research on our blog.
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 the formula needs to reach. 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 parabens, sulfates, fragrance, and dyes. 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 dual-peptide face 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.
From the PLU blog
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GHK-Cu vs Finasteride For Hair Loss
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NAD+ vs GHK-Cu: Can You Use GHK-Cu and NAD+ Together?
Everything starts to slow down the older you get. Your recovery, your cognition, your energy. Even your skin starts to change. This is because a lot of the natural compounds in your body start dimi...
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