01 · Clean, dry scalpSpray onto the scalp
Apply a few sprays directly onto a clean, dry scalp, focusing on the part and areas that look thinner. If your hair is fine or gets oily quickly, start with fewer sprays.
About this serum
GHK-Cu Copper Peptide Hair & Scalp Serum is a 2 oz (60 mL) water-based serum with 2,400 mg (4%) of GHK-Cu, also known as Copper Tripeptide-1.
It has two ingredients: GHK-Cu and distilled water. The blue color comes from the copper peptide itself.
A fine-mist spray puts it straight onto the scalp. It is designed to absorb in minutes without leaving hair greasy or sticky.
What it may help with over time What it may help with
- May help condition the scalp and keep it feeling comfortable
- May help hair look healthier and better conditioned
- Supports the look of thicker, fuller hair over time
- Absorbs in minutes, with no grease or residue
- Fits a simple once-daily routine
Full descriptionWhat is in the bottle · Reading the label · Who it suits · Limitations
El Sérum de Péptidos de Cobre GHK-Cu ahora presenta una fórmula azul única, elaborada por nuestra empresa familiar, donde nuestros tres fundadores, que aún son calvos, se dedican a prevenir la caída del cabello. Este sérum de dos ingredientes nutre el cuero cabelludo para un cabello más abundante y saludable. Fabricado con orgullo en EE. UU., es simple, eficaz y garantiza satisfacción.
Modo de empleo: Aplique unas gotas del Sérum de Péptidos de Cobre GHK-Cu directamente en el cuero cabelludo una vez al día. Masajee suavemente para asegurar una penetración profunda.
K.W.
Verified customer
Before and after, from customers
Verified customers shared these photos of their progress with this serum. Each pair starts at week 0.
Customer photos show individual experiences. They are not a controlled clinical study and should not be used to predict what another customer will experience.
K.W.
Individual results vary. These are customer experiences, not a clinical study.
The serum in two and a half minutes
Sisse Marie, one of the family founders of Neurogan Health, walks through what the serum is, what is in it, how to apply it and why daily use matters.
In this video
Individual results vary. This is a cosmetic product, not a hair-loss treatment.
Copper Tripeptide-1
What GHK-Cu is
A short guide to the one active in the bottle.
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01
A peptide is a short chain of amino acids. GHK-Cu is three of them, glycine, histidine and lysine, holding a copper ion. The copper is why the serum is blue.
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02
GHK-Cu occurs naturally in the body. Most of its research is on skin, and it is also the active in our face creams.
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03
On hair, a small 2026 study found a 2% GHK-Cu serum may support the look of eyebrow hair over 12 weeks. The scalp and this 4% serum were not tested.
Two ingredients in every bottle
The complete formula, as printed on the bottle.
COPPER PEPTIDE ACTIVE
GHK-Cu
Copper Tripeptide-1
The only active in the serum, at 2,400 mg per bottle. It is used here as a cosmetic ingredient for the scalp, and it gives the serum its blue color.
The complete label listAll ingredients · as printed on the label
- Medical Grade Distilled Water GHK-Cu (Copper Tripeptide-1)
As printed on the bottle.
No fragrance or fillers
The full label is two lines long, so it takes seconds to check what goes on your scalp.
Natural copper peptide color
The blue comes from GHK-Cu itself, not from an added dye.
What the first 12 weeks look like
Changes to how hair looks take time. This is what the first three months usually involve, with a few words from customers along the way.
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Day 1
Take a starting photo
Photograph your part or crown in daylight before the first spray, and repeat the same photo every four weeks. Gradual changes are hard to see in a mirror, and a Day 1 photo makes them easier to judge.
“I appreciate it not leaving any residue.” Heather M.
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Weeks 1 to 4
Build the habit
The goal now is to apply it every day. The serum may help condition the scalp, and some people first notice that their scalp feels more comfortable. Visible changes to hair are unlikely this early: this phase is about building the habit.
Tip: pair it with something you already do daily, such as brushing your teeth, so it is easy to remember.
“Non greasy and absorbs well so you can use at anytime.” Elaine B.
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Weeks 5 to 8
Early signs, for some
Hair and scalp may start to look and feel more hydrated and conditioned. Some people notice certain areas looking a little fuller or more voluminous.
Everyone moves at a different pace. Compare with your Day 1 photo rather than relying on the mirror, and keep going if you do not see a change yet.
“After just 30 days of using it once a day, my hair and scalp already look and feel healthier.” Anthony M.
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Weeks 9 to 12
Time to assess
With continued use, hair may look denser and more resilient, and some people say it looks thicker and fuller over time. This is when most people judge the serum, so take a new photo and compare it with Day 1.
With once-daily use, one bottle lasts about 60 days, depending on how much you spray each time. A full 12 weeks usually takes two bottles, and Subscribe and Save can send the next one before you run out.
“A product that actually begins to show results at 3 month mark.” Sean W.
Quotes are from verified customer reviews and describe individual experiences, not a clinical study. Results vary. This is a cosmetic product, not a hair-loss treatment.
A few sprays, once a day
Use it once daily, morning or before bed. Consistency matters more than the time of day.
01 · Clean, dry scalp
02 · 30 to 60 secondsMassage it in
Massage the serum in with your fingertips as you spray, for 30 to 60 seconds, so it stays on the scalp instead of running down.
03 · Every dayLet it absorb, keep it daily
No need to rinse. The formula absorbs in minutes. Use it daily and allow 8 to 12 weeks before judging results.
Very light or white hair
The serum is blue. On very light, white or silver hair it can leave a temporary tint. Spray at the scalp rather than along the lengths, massage it in, and it washes out with your next shampoo.
With other hair products
Apply it to a clean scalp before styling products. If you use a prescription or medicated hair product, ask your clinician how to fit both into your routine.
For external use
For the scalp only. Avoid the eyes, and stop using it if irritation occurs.
What lab testing shows, and what research can tell us
Each certificate of analysis documents what an independent lab measured in one specific batch of this serum.
Published research on GHK-Cu is a different kind of evidence. It is mostly about skin, and even the ingredient studies closest to hair do not test this finished serum. See the Neurogan evidence map.
Two kinds of evidence
Lab reportTests a specific batch, ingredient or finished product.
Published researchStudies GHK-Cu generally, not this exact finished serum.
PilotLimited evidence
GHK-Cu in skincare research
Small human reports on leave-on GHK-Cu creams describe fewer visible lines and wrinkles and less laxity. The Neurogan evidence map rates this research as pilot-stage with limited evidence, and notes that it does not extend to hair growth.
Neurogan evidence map · GHK-Cu18adults · 12 weeks
2% GHK-Cu on eyebrows
In a small randomized, double-blind study, 18 healthy adults applied a 2% GHK-Cu serum to one eyebrow and a placebo to the other, twice daily for 12 weeks. The findings suggest GHK-Cu may support the appearance of eyebrow hair, but eyebrows are not the scalp and this 4% serum was not tested.
Bo et al., 2026Certificate of analysis
References · Ingredient research, not studies of this finished product 3
- Neurogan Science. GHK-Cu: evidence review (V2). Research maturity: pilot. Evidence strength: limited. Read the review ↗
- Bo SL, Nararatwanchai T, Supornpun N, Poomarapan K, Thaploka S. The Efficacy of 2% Copper Peptide (GHK-Cu) Serum for Eyebrow Hypotrichosis: A Randomized, Double-Blind, Vehicle-Controlled, Split-Face Comparative Study. Procedia of Multidisciplinary Research. 2026;4(5). Read the paper ↗
- Review of GHK-Cu in topical skincare, cited by the evidence map. BioImpacts. doi:10.34172/bi.30071. Read the paper ↗
Three copper peptide sprays, side by side
They differ in which copper peptide they carry, how often you use them and how long a bottle lasts. No study has compared them, so pick the one that suits your routine.
This page
GHK-Cu Hair & Scalp Serum
$55 a bottle
$0.92 a day · lasts about 60 days
- AHK-Cu per bottle
- None
- GHK-Cu per bottle
- 2,400 mg
- Daily routine
- Once a day
- Ingredients
- GHK-Cu, distilled water
Suits you if you want a once-daily GHK-Cu mist at the lowest price.
A subscription, delivered every month. Pause or cancel any time.
AHK-Cu + GHK-Cu Hair Serum Pro
$185 a bottle
$6.17 a day · lasts about 30 days
- AHK-Cu per bottle
- 2,400 mg
- GHK-Cu per bottle
- 2,400 mg
- Daily routine
- Morning and night
- Ingredients
- AHK-Cu, GHK-Cu, distilled water
Suits you if you want both copper peptides in one spray.
AHK-Cu Copper Peptide Hair Serum 4800mg
$229 a bottle
$7.63 a day · lasts about 30 days
- AHK-Cu per bottle
- 4,800 mg
- GHK-Cu per bottle
- None
- Daily routine
- Morning and night
- Ingredients
- AHK-Cu, distilled water
Suits you if you want the most AHK-Cu in one bottle, or AHK-Cu as its own step next to a GHK-Cu product.
30-day money-back guarantee
Bottle life assumes the suggested use and depends on how much you spray.
What customers are saying
Reviews marked Verified Buyer are from confirmed purchases.
Customer reviews describe personal experiences with this serum and are not clinical evidence.
Individual results vary. These are customer experiences, not a clinical study.
Questions we hear most often
Give it 8 to 12 weeks of daily use. The first weeks are about consistency, and some people notice their scalp feels more comfortable first. Results vary from person to person.
The serum is blue because of the copper peptide. On most hair it absorbs without a trace. On very light, white or silver hair it can leave a temporary tint, so spray at the scalp rather than along the lengths and massage it in. Any tint washes out with shampoo.
Use it once daily: a few sprays on a clean, dry scalp. At that rate one 2 oz (60 mL) bottle lasts about 60 days, depending on how much you spray each time. Subscribe and Save takes 20% off every bottle.
It is a two-ingredient, water-based serum, so it fits easily into most routines. Spray it on first and let it absorb before any styling products. If you use minoxidil or any other prescription or medicated product, ask your clinician how to combine them. We do not claim that combining products gives better results.
Microneedling breaks the skin barrier, so follow your professional's advice or the device instructions. Many people wait until the scalp has settled before applying any serum.
Yes. It is a water-based serum applied to the scalp and suits all hair types. If your hair is bleached, very light or silver, try it on a small area first because of the blue color.
No. It is a cosmetic product, not a drug. It may help condition the scalp and support the appearance of fuller-looking hair. For sudden or patchy hair loss, see a doctor or dermatologist.
We offer a 30-day money-back guarantee. If you are not happy for any reason, let us know and we will give you a full refund.
Still have a question?
Talk to us
Start your first 12 weeks
2,400 mg of GHK-Cu in distilled water, in a 2 oz fine-mist bottle.
- About 60 days per bottle with once-daily use, depending on how much you spray
- 20% off every bottle with Subscribe and Save, pause or cancel any time
- Try it for 30 days, risk-free
Adds a subscription, delivered every 2 months (about one bottle per delivery).
Ships in 1–3 business days