Comparing the 5 Best Copper Peptides For Hair Growth

There’s been so much discussion on the potential benefits of copper peptides for hair growth - but as you can imagine, not all formulas are made equal. We’ve rounded up this review of the top 5 best copper peptides for hair growth so you don’t have to do all the digging yourself.

Each of the brands and products has been chosen based on extensive review, so you can rest assured you’re getting a safe, effective solution to help your hair thrive. But if you truly want the best copper peptide hair regrowth serum, look no further than PLU Laboratories Copper Peptide Hair Tonic. It’s a powerful blend of GHK-Cu and Acetyl Tetrapeptide-3. Learn more about why it’s the #1 choice and how it stacks up to other great options below. 

Key Takeaways

• GHK-Cu has hair growth studies going as far back as 1991.
• AHK-Cu is a newer copper peptide that’s generating quite a bit of buzz, too.
• Concentration is everything. Any product that doesn’t disclose it is likely selling something underformulated.
• Fewer ingredients is generally indicative of a better formula overall. A lot of brands dilute the peptides with fluff and filler.
• PLU Laboratories makes the #1 copper peptide serum for hair growth, but Neurogan, Divi, and other companies make solid candidates, too.
• Commit to 6-8 weeks of consistent daily use. Peptides will not regrow hair overnight.

Compare the Best Copper Peptides For Hair Growth

Why PLU Laboratories Copper Peptide Hair Tonic is the #1 Choice

We want to give you the fast answer if you’re in a rush and just want the best copper peptides for hair growth. You should read on below to learn more about your options and discover the science behind copper peptide serum for hair growth, but PLU Laboratories is the best overall.

PLU Laboratories actually makes two copper peptide serums for hair growth. If we had to recommend only one, though, it would be the Copper Peptide Hair Tonic with GHK-Cu and Acetyl Tetrapeptide-3.

This formula is backed by hundreds of clinician endorsements and tons of positive user reviews. What separates it from the rest is how concentrated it is. Rather than diluting the formula with fluff and filler, it features just 5 ingredients. GHK-Cu and Acetyl Tetrapeptide-3 work to reawaken follicles and encourage thicker-looking hair. 

You get the best bang for your buck with the full-size bottle, which works out to just $1.08 per day when you subscribe ($1.27 per day one-time). It’s made here in the USA, third-party lab tested, and comes with 30-day returns, even if you’ve opened it.

What to Look For in the Best Copper Peptides For Hair Growth

How can you be sure you’re getting the best copper peptides for hair growth with every brand on the market claiming their formula is superior? It’s so easy to get bogged down by the noise. These are the things that matter most - tune out everything else:

• Peptide type: There are many copper peptides out there, but really, only two belong in hair growth conversations: GHK-Cu and AHK-Cu. In that order. 
• Concentration: The worst thing you can do is by a product that contains peptides in suboptimal concentrations. You’ll end up wasting your money and spinning your tires on progress, frustrated that “peptides just don’t work for you.” But it was a diluted formula. Any product that doesn’t list the exact concentration is likely hiding something. 
• Total ingredients: Less is more. A 5-ingredient formula with ample concentrations will typically outperform something with 27 different ingredients. 
• Third-party testing: This gives you peace of mind that what’s on the product label is actually inside the bottle. It also ensures there are no contaminants inside (heavy metals, for instance).
• Complementary peptides: A multi-peptide system (such as GHK-Cu paired with Acetyl Tetrapeptide-3) will address hair health from more angles.  
• Value for the money: Not price alone. The cheapest option is almost never the best value for your money. You get what you pay for, so zoom out when looking at cost and consider what all you’re getting (complementary ingredients and concentration).

Board-certified dermatologist Dr. Amy Forman Taub tells patients to “look for formulas that combine peptides with ingredients like copper tripeptide, caffeine, niacinamide, and panthenol, and ideally products backed by clinical research rather than marketing buzzwords alone.”¹

The problem with that rationale is that brands will dilute the peptide content with those other ingredients, so you don’t actually end up getting the support you need. That’s why the simplest way to search for peptide hair growth serums is a two-step process:

1. Peptide type first (GHK-Cu)
2. Concentration second (1%)

That being said, let’s take a closer look at all the best copper peptides for hair growth below. 

In-Depth Review of the Best Copper Peptide Hair Growth Serums

Each of these serums has been meticulously evaluated based on the criteria we laid out above, so you can trust that every product is here for a reason. 

But like we said from the get-go, you can save yourself the time and hassle of comparing options and just go with the best copper peptide serum for hair growth: PLU Laboratories Copper Peptide Hair Tonic.

1. PLU Laboratories Copper Peptide Hair Tonic

• Peptide type: GHK-Cu (Copper Tripeptide-1) + Acetyl Tetrapeptide-3
• Concentration: 1% GHK-Cu, 1% Acetyl Tetrapeptide-3
• Total ingredients: 5
• Price: $39.99 (10 mL) / $79.99 (30 mL)
• Verification: LC-MS + ICP-MS at University of Illinois at Chicago

No other copper peptides for hair come close to the formula from PLU Laboratories. GHK-Cu is the star of the show, but the Acetyl Tetrapeptide-3 content is important as well. This biomimetic peptide has been researched for hair follicle structure and may make hair look thicker, too. 

It’s so easy to incorporate in your daily ritual. Apply 2-3 drops to the scalp, massage for 30 seconds, and let the peptides work their magic. A lot of customers see the first signs of progress in just 6-8 weeks.

2. PLU Laboratories Hair Tonic with AHK-Cu

• Peptide type: AHK-Cu (Copper Tripeptide-3) + Acetyl Tetrapeptide-3
• Concentration: 1% AHK-Cu, 1% Acetyl Tetrapeptide-3
• Total ingredients: 5
• Price: $59.99 (10 mL) / $119.99 (30 mL)
• Verification: LC-MS + ICP-MS at University of Illinois at Chicago

The second-best copper peptide serum for hair growth also comes from PLU Laboratories. This one is worth trying if you’ve given GHK-Cu a really good chance in the past and just didn’t see the results you wanted. 

The AHK-Cu peptide is a synthetic variant with a different amino acid sequence. It’s much newer, so we don’t have nearly as much research supporting its role in hair growth as we do for GHK-Cu. But what we do know already is very promising.

The formula features not just AHK-Cu but Acetyl Tetrapeptide-3. It’s essentially the same product as the #1 pick but with AHK-Cu in place of GHK-Cu. Our blog has a great comparison of AHK-Cu vs GHK-Cu if you want to learn more. 

3. Neurogan Health GHK-Cu Copper Peptide Hair & Scalp Serum

• Peptide type: GHK-Cu
• Concentration: 4% (2,400 mg)
• Total ingredients: 2
• Price: $55.00
• Size: 2 oz (60 mL)

Neurogan makes a great copper peptide serum for hair growth if you want the most minimalist formula possible. It’s quite literally just GHK-Cu and water. We can appreciate that, considering it’s very concentrated at 4%.

The other reason Neurogan is a great option is value for your money. It’s a 60mL bottle, which is twice as much as basically every other brand we compared. Yet, it’s only $55. Very good bang for your buck.

4. Aseir Custom CP Serum

• Peptide type: GHK-Cu + Carbon 60
• Concentration: 3% GHK-Cu (Serum A)
• Total ingredients: 13 (across both serums)
• Price: $249.99
• Size: 2x 30 mL (Serum A + Serum B)

Before you scoff at the sticker price, hear us out. You’re getting two distinct serums, each 30mL. It’s a complete system, and one with a lot of hype behind it. 

Serum A features 3% GHK-Cu, Aloe, Pineapple and Papaya Extracts, Organic Alcohol, and L-Arginine. Serum B is Organic Grapeseed Oil and Carbon 60, a molecule with some pretty interesting hair growth research behind it.

Is it affordable? Definitely not. It’s by far the most expensive option on this list. But it’s super concentrated and you’re getting well-rounded support. 

5. Divi Scalp Serum

• Peptide type: Copper Tripeptide-1 + Acetyl Tetrapeptide-3
• Concentration: Not disclosed
• Total ingredients: 27
• Price: $48.00
• Size: 30 mL

Divi doesn’t disclose its copper peptide concentration, which is why the scalp serum slid so far down this list. But, the brand does have a really solid reputation in this space. It’s one of the most well-established hair growth brands on social media.

The formula features GHK-Cu and Acetyl Tetrapeptide-3 - very similar to the formula PLU Laboratories makes. The difference is in the rest of the supporting cast. Divi also includes Caffeine, Biotin, Hyaluronic Acid, Tea Tree Oil, Rosemary Extract, Peppermint Oil, Eucalyptus Oil, Menthol, Vitamin C, Copper Gluconate, and amino acids.

That’s a lot of stuff in one formula (27 total ingredients, to be exact). None are harmful, but we think there’s a reason the brand chose not to tell you how much GHK-Cu you’re actually getting. It’s likely quite underwhelming. 

Which is Right For Your Hair?

You could make the case for any of these products as the best copper peptide hair growth serum for a specific goal. It just comes down to what you’re looking for exactly.

• Best overall: PLU Laboratories GHK-Cu Copper Peptide Hair Tonic. Dual-peptide formula, verified concentrations, 5 ingredients, accessible price. 
• Best for exploring AHK-Cu: PLU Laboratories Hair Tonic with AHK-Cu. Same formula structure but with a totally unique copper peptide variant for direct comparison.
• Highest single-peptide GHK-Cu: Neurogan Health’s 4% GHK-Cu serum with nothing else added to the bottle. The copper peptide can work in isolation.
• Most diverse ingredient list: Divi with 27 total ingredients (just be aware the peptide content might be a little underwhelming).

Get more specific about what exactly you’re looking for, and it’ll be a whole lot easier to narrow it down to the best copper peptides for hair growth. 

What Does the Research Actually Say About Copper Peptides For Hair Growth?

It’s natural to have your doubts about anything claiming it can restore healthy hair growth when you’ve tried other products to no avail. But there is legitimate clinical evidence supporting copper peptides for hair - and more specifically, GHK-Cu serum for hair.

Current Evidence on Copper Peptides For Hair Growth

We first started discovering how powerful copper peptides could be for hair more than 35 years ago. Scientists witnessed copper peptide complexes stimulate hair follicle activity in mice.² But these days, we know a lot more about what’s possible with peptides.

Dr. Morayo Adisa says, “Peptides are a great addition to a treatment plan. Preliminarily, peptides have been shown to enhance the scalp and follicle environment for improvement of hair growth quality and density.”³

There have been many other studies conducted over the years to confirm the GHK-Cu hair growth potential. It appears to support follicle cell proliferation while lowering cell death markers.⁴ A 2015 review showed that GHK-Cu played a role in modulating a myriad of cellular pathways that are all relevant to not just hair health but skin health.⁵ The most recent research back in 2025 found that GHK-Cu managed to achieve a median 25.6% hair regrowth rate.⁶

Why GHK-Cu is the Best Copper Peptide For Hair

GHK-Cu naturally exists in your plasma right now. But, your body has less and less of it as you get older. That’s part of why you may notice changes to your skin and hair over the years. 

This is why it’s the best copper peptide for hair growth to supplement with. It’s also where most of the research on copper peptides for hair growth specifically exists. So, what are you waiting for? Bring out the best in your hair with GHK-Cu hair growth serum today!

Frequently asked questions

References

1. Taub AF. "Peptides Are Everywhere: An Expert Reveals Why the Viral Ingredient Is the Secret to Hair Growth." E! Online, 2026. Source
2. Trachy RE, et al. "The hair follicle-stimulating properties of peptide copper complexes. Results in C3H mice." Annals of the New York Academy of Sciences. 1991. PubMed
3. Adisa M. "Why Experts Say Peptides Just Might Be the Secret to Reviving Thinning Hair." Yahoo Shopping, 2026. Source
4. Pyo HK, Yoo HG, et al. "The effect of tripeptide-copper complex on human hair growth in vitro." Archives of Pharmacal Research. 2007;30(7):834-839. PubMed
5. Pickart L, Vasquez-Soltero JM, Margolina A. "GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration." BioMed Research International. 2015;2015:648108. PubMed
6. Kuceki G, Coppinger AJ, et al. "Enhanced hair regrowth with five monthly sessions of minoxidil-dutasteride-copper peptides tattooing for androgenetic alopecia." JAAD International. 2025;20:38-40. PubMed