01 · Apply to wet hairMassage into the scalp
Work the shampoo through wet hair and scalp, focusing on the roots and scalp rather than only the hair lengths.
About this shampoo
GHK-Cu + AHK-Cu Copper Peptide Shampoo is a rinse-off hair and scalp formula combining two different copper-binding tripeptides in a daily cleansing base.
Each 8 oz (237 mL) bottle is formulated and labeled with 4,000 mg total copper peptides: 3,000 mg GHK-Cu + 1,000 mg AHK-Cu. The formula also contains aloe vera leaf juice and a cleansing system designed to create a light, foamy lather across the hair and scalp.
GHK-Cu and AHK-Cu have different research histories. AHK-Cu has direct experimental research involving human hair follicles and dermal papilla cells, while GHK-Cu has a broader research history across skin and tissue biology.
This shampoo is a rinse-off cosmetic. Published peptide research did not test this finished shampoo and should not be treated as proof that it regrows hair or treats hair loss.
What you can expect What to expect
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Daily scalp and hair cleansing
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Light, foamy lather
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Dual GHK-Cu + AHK-Cu formula
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Easy rinse-off step before conditioner or serum
Full descriptionWhy two copper peptides · Why a 3:1 formula · Rinse-off vs. leave-on · What it has not been shown to do
Why use two copper peptides in a shampoo?
GHK-Cu and AHK-Cu are related copper-binding tripeptides, but they are different molecules with different research histories.
AHK-Cu has direct experimental research involving isolated human hair follicles and cultured dermal papilla cells.
GHK and GHK-Cu have a broader research history across skin and tissue biology. A small human hair study has also evaluated GHK peptide as part of a multi-ingredient topical treatment, but that research did not test this shampoo.
This formula combines both peptides in a rinse-off format for users who want copper peptides built into their regular wash routine.
Why a 3:1 formula?
The shampoo is formulated and labeled with 3,000 mg GHK-Cu + 1,000 mg AHK-Cu, creating a 3:1 target ratio and 4,000 mg total copper peptides per bottle.
The 3:1 ratio defines the product's composition. There is currently no controlled human study establishing a 3:1 GHK-Cu-to-AHK-Cu ratio as the clinically optimal ratio for hair growth.
Rinse-off vs. leave-on copper peptides
A shampoo creates a different exposure than a leave-on scalp serum.
This product is massaged through wet hair and scalp, left on for 1 to 2 minutes, and then rinsed away. A leave-on serum remains on the scalp between washes.
Research performed on isolated peptides, cultured cells or leave-on treatments should therefore not be assumed to predict what a rinse-off shampoo will do.
What this product has not been shown to do
This is a cosmetic shampoo, not an FDA-approved hair-loss treatment.
No controlled human trial has established that this finished shampoo regrows hair, increases hair density, reverses follicle miniaturization or treats a diagnosed hair-loss condition.
What's in the 3:1 copper peptide formula?
The shampoo is formulated with two different copper peptides in a 3:1 target ratio.
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01
3,000 mg GHK-Cu. Listed as Copper Tripeptide-1, GHK-Cu has a broad research history across skin, tissue, extracellular-matrix and related biology.
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02
1,000 mg AHK-Cu. Listed as Copper Tripeptide-3, AHK-Cu has direct experimental research involving human hair follicles and dermal papilla cells.
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03
4,000 mg total copper peptides. The amounts describe this shampoo's formulation. The combination has not been clinically proven superior to a single-peptide shampoo.
What goes into the bottle
A daily rinse-off shampoo formulated with a cleansing base, aloe vera leaf juice and two copper peptides. Open the complete label list for every ingredient in label order.
COPPER PEPTIDE · 3,000 MG
GHK-Cu
Copper Tripeptide-1
The larger copper-peptide component in this shampoo's 3:1 target formulation. The current lot tested at 3,102 mg.
The complete label listAll ingredients · in label order
- Water (Aqua)
- Sodium C14-C16 Olefin Sulfonate
- Cocamide MIPA
- Cocamidopropyl Hydroxysultaine
- Aloe Barbadensis Leaf Juice
- Sodium Chloride
- Fragrance (Parfum)
- Phenoxyethanol
- Caprylyl Glycol
- Copper Tripeptide-1 (GHK-Cu)
- Copper Tripeptide-3 (AHK-Cu)
- Citric Acid
- Linalool
- Yellow 5
- Blue 1
As printed on the bottle, with the common names of the two peptides added.
Colored with Yellow 5 and Blue 1
The finished color comes from the copper peptides and two added colorants, Yellow 5 and Blue 1, listed last on the label.
Fragrance and linalool
The light scent comes from added fragrance. Linalool is one of its components and is named on the label.
No parabens
The preservatives are phenoxyethanol and caprylyl glycol.
A simple daily wash routine
Daily rinse-off use on wet hair and scalp.
01 · Apply to wet hair
02 · Leave on 1 to 2 minutesUse the labeled contact time
Leave the shampoo on for 1 to 2 minutes, as the product directions say. Wash your face or body in that time, so the routine takes no longer than before.
03 · Rinse thoroughlyRemove the shampoo completely
Rinse thoroughly. Follow with conditioner if you like, and apply any leave-on scalp serum according to its own directions.
If your scalp is sensitive
The formula contains fragrance, linalool and colorants in addition to its cleansing ingredients and peptides. Keep it out of your eyes, and stop use if significant irritation develops.
Very light, bleached or grey hair
The shampoo is blue. Rinse until the water runs clear, and try it on one section first if your hair is very light or porous.
Complete the wash routine
After rinsing, follow with the GHK-Cu + AHK-Cu Conditioner if desired. A leave-on scalp serum can be used separately according to its own directions.
What the lab report shows, and what research can tell us
Product testing and published peptide research answer different questions. The lab report documents measurements on a specific shampoo lot. Published research examines AHK-Cu or GHK/GHK-Cu more broadly and does not test this finished shampoo. We keep the two separate.
Two kinds of evidence
Lab reportTests one lot of this finished shampoo.
Published researchStudies each peptide more broadly, never this shampoo.
Ex vivoHuman hair follicles
AHK-Cu in ex vivo research
AHK-Cu was tested in isolated human hair follicles and stimulated follicle elongation under laboratory conditions. The study did not evaluate this finished shampoo or establish that rinsing AHK-Cu from the scalp after 1 to 2 minutes produces the same outcome.
Read the full AHK-Cu hair research review
Ingredient research · Pyo et al., 2007 · not this finished productHumanHair study
GHK peptide in a combination treatment
A small human study evaluated GHK peptide together with 5-aminolevulinic acid in a topical treatment for men with pattern hair loss. The study did not isolate GHK-Cu and did not test a rinse-off shampoo.
Combination-formula research · Lee et al., 2016 · not this finished productNot yetRinse-off evidence
What has not been clinically established
No controlled human trial has established that this GHK-Cu + AHK-Cu shampoo increases hair count, regrows hair or treats a diagnosed hair-loss condition. A rinse-off shampoo also creates different exposure from the laboratory models and leave-on treatments used in peptide research.
Evidence limitation · finished shampoo not clinically tested for hair growthCertificate of analysis
References · Ingredient research, not studies of this finished shampoo 3
- Pyo HK, Yoo HG, Won CH, et al. The effect of tripeptide-copper complex on human hair growth in vitro. Archives of Pharmacal Research. 2007;30(7):834-839. doi:10.1007/BF02978833. View study ↗
- Lee WJ, Sim HB, Jang YH, Lee SJ, Kim DW, Yim SH. Efficacy of a Complex of 5-Aminolevulinic Acid and Glycyl-Histidyl-Lysine Peptide on Hair Growth. Annals of Dermatology. 2016;28(4):438-443. doi:10.5021/ad.2016.28.4.438. View study ↗
- Fan C, Chen Y, Huang Q, et al. Overview of Short Peptides for Hair Loss. Biomedicines. 2026;14(4):864. View review ↗
Where does each product fit?
A routine comparison rather than stronger versus weaker: each product does a different job.
This page
GHK-Cu + AHK-Cu Shampoo
$59
$0.98 a day · lasts about 60 days
- Role
- Cleanse
- Format
- Rinse-off
- Where used
- Wet scalp & hair
- Contact
- 1 to 2 minutes
Suits you if you want copper peptides integrated into the cleansing step of your regular hair routine.
A subscription, delivered every 2 months. Pause or cancel any time.
GHK-Cu + AHK-Cu Hair Conditioner
$59
$0.98 a day · lasts about 60 days
- Role
- Condition
- Format
- Rinse-off
- Where used
- Primarily mid-lengths to ends
- Contact
- 2 to 3 minutes
Suits you if you want a rinse-off conditioning step after cleansing.
AHK-Cu + GHK-Cu Hair Serum Pro
$185
$6.17 a day · lasts about 30 days
- Role
- Leave-on scalp care
- Format
- Leave-on
- Where used
- Directly on scalp
- Contact
- Remains on scalp
Suits you if you want AHK-Cu + GHK-Cu in a formula that remains on the scalp after application.
30-day money-back guarantee
Days per bottle assume the suggested use and depend on how much you use.
What customers are saying
Reviews marked Verified Buyer are from confirmed purchases. Customer reviews describe individual experiences with this shampoo and should not be interpreted as clinical evidence. Every review is shown.
Individual results vary. These are customer experiences, not a clinical study.
Questions we hear most often
The product is formulated and labeled with 3,000 mg GHK-Cu + 1,000 mg AHK-Cu per 8 oz bottle, for 4,000 mg total copper peptides. The current documented lot tested at 3,102 mg GHK-Cu and 1,096 mg AHK-Cu.
GHK-Cu and AHK-Cu are different copper-binding tripeptides with different research histories. This shampoo includes both in a 3:1 target formulation. The combination has not been clinically proven superior to a single-peptide shampoo.
This finished shampoo has not been shown in a controlled human clinical trial to regrow hair. AHK-Cu has experimental hair-follicle research, while GHK has a separate research history.
Apply to wet hair and scalp, massage through the scalp, leave on for 1 to 2 minutes and rinse thoroughly. The current product directions say to use daily.
The current product directions call for daily use. Adjust your routine if your scalp becomes irritated or if a healthcare professional recommends otherwise.
No. The current ingredient list contains Sodium C14-C16 Olefin Sulfonate. It does not contain sodium lauryl sulfate or sodium laureth sulfate.
No. The current formula contains Fragrance (Parfum) and Linalool.
Yes. The current ingredient list includes Yellow 5 and Blue 1.
No parabens appear in the current ingredient list.
The current formula contains both copper peptides and added colorants, including Blue 1 and Yellow 5. Unlike the pure peptide serums, the shampoo's finished color should not be attributed solely to the copper-peptide complexes.
Yes. The shampoo is designed as the cleansing step; the conditioner follows as the rinse-off conditioning step.
Yes, if the serum's own directions are followed. The shampoo should be rinsed thoroughly before moving to a leave-on scalp routine.
The current COA is available through the Lab Results section and Neurogan Health's Lab Results page.
Still have a question?
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Make copper peptides part of your wash routine
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- Lab report for the current lot, linked above
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For external use only. Avoid contact with the eyes. Stop use if irritation occurs. Keep out of reach of children. This cosmetic product is not intended to diagnose, treat, cure or prevent any disease.