01 · Apply after shampooingFocus on the mid-lengths to ends
Apply the conditioner evenly through the hair after shampooing, concentrating primarily on the mid-lengths and ends.
About this conditioner
GHK-Cu + AHK-Cu Copper Peptide Conditioner is a rinse-off conditioning formula combining two copper-binding tripeptides with a blend of conditioning agents, plant oils, shea butter and panthenol.
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 conditioner is designed for use after shampooing, primarily from the mid-lengths to ends, with a 2 to 3 minute contact time before rinsing. Because it is a rinse-off conditioner applied mainly to the hair lengths, its role is different from a leave-on copper peptide scalp serum.
Published copper-peptide research helps explain why GHK-Cu and AHK-Cu are used in hair products, but those studies did not test this finished conditioner.
What you can expect What to expect
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Softness and manageability
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Rich, lightweight conditioning
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Rinses clean without a heavy leave-on feel
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Dual GHK-Cu + AHK-Cu formula
Full descriptionWhy copper peptides in a conditioner · Why a 3:1 formula · Conditioning ingredients · What it has not been shown to do
Why copper peptides in a conditioner?
GHK-Cu and AHK-Cu are different copper-binding tripeptides 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.
That ingredient research provides context for why copper peptides appear in hair-care formulas, but it does not establish that a rinse-off conditioner applied primarily from mid-lengths to ends reproduces effects seen in isolated follicles or laboratory cell models.
Why a 3:1 formula?
The conditioner 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 that a 3:1 GHK-Cu-to-AHK-Cu ratio is clinically optimal for hair growth or conditioning.
Conditioning ingredients beyond the peptides
The formula also contains a broader conditioning system that includes cetearyl alcohol, caprylic/capric triglycerides, sunflower seed oil, shea butter, panthenol, vitamin E, aloe vera leaf juice and flaxseed extract.
These ingredients help define the conditioner as a cosmetic hair-care product rather than simply a peptide solution.
What this product has not been shown to do
This is a cosmetic rinse-off conditioner, not an FDA-approved hair-loss treatment.
No controlled human trial has established that this finished conditioner regrows hair, increases hair count or density, reverses follicle miniaturization or treats a diagnosed hair-loss condition.
Rich conditioning without a heavy leave-on step
The conditioner combines its dual copper-peptide formula with traditional conditioning and emollient ingredients.
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01
Conditioning base. Cetearyl alcohol, stearalkonium chloride and guar hydroxypropyltrimonium chloride help give the formula its slip and conditioning feel.
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02
Emollient oils and butters. Sunflower seed oil, caprylic/capric triglycerides and shea butter contribute to the formula's rich texture.
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03
Supporting hair-care ingredients. Panthenol, vitamin E, aloe vera leaf juice and flaxseed extract round out the conditioning formula.
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Dual copper peptides. The product is formulated with 3,000 mg GHK-Cu and 1,000 mg AHK-Cu per bottle, the same 3:1 ratio as the matching shampoo.
What goes into the bottle
A rinse-off conditioning formula with dual copper peptides, emollients, conditioning agents and botanical ingredients. 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 conditioner's 3:1 target formula. The current lot tested at 3,049 mg.
The complete label listAll ingredients · in label order
- Water (Aqua)
- Cetearyl Alcohol
- Glycerin
- Caprylic/Capric Triglycerides
- Helianthus Annuus (Sunflower) Seed Oil
- PEG-40 Castor Oil
- Stearalkonium Chloride
- Guar Hydroxypropyltrimonium Chloride
- Butyrospermum Parkii (Shea) Butter
- Panthenol
- Tocopheryl Acetate
- Aloe Barbadensis Leaf Juice
- Linum Usitatissimum (Flaxseed) Extract
- Fragrance (Parfum)
- Phenoxyethanol
- Copper Tripeptide-1 (GHK-Cu)
- Copper Tripeptide-3 (AHK-Cu)
- Caprylyl Glycol
- Coumarin
- Yellow 6
As printed on the bottle, with the common names of the two peptides added.
Colored with Yellow 6
One added colorant, listed last on the label. The finished color should not be attributed solely to the copper peptides.
Fragrance and coumarin
The light, warm scent comes from added fragrance. Coumarin is one of its components and is named on the label.
No parabens
The preservatives are phenoxyethanol and caprylyl glycol.
A simple conditioning step
Daily rinse-off use after shampooing.
01 · Apply after shampooing
02 · Leave on 2 to 3 minutesUse the labeled contact time
Run your fingers or a wide-tooth comb through the lengths, then allow the conditioner to remain on the hair for 2 to 3 minutes.
03 · Rinse thoroughlyRemove the conditioner completely
Rinse thoroughly, so nothing is left behind to weigh fine hair down. The current label directs daily use.
Fine hair
Use a little less and start below the ears, so the roots stay light.
If you're sensitive to fragrance
The formula contains Fragrance (Parfum) and Coumarin. Keep it on the lengths, and stop use if significant irritation develops. On very light or bleached hair, try it on one section first.
Pair it with the matching shampoo
Use the GHK-Cu + AHK-Cu Shampoo first as the cleansing step, rinse thoroughly, then apply the conditioner primarily from the mid-lengths to ends.
What the lab report shows, and what research can tell us
Product testing and published ingredient research answer different questions. The lab report documents measurements on a specific conditioner lot. Published research examines AHK-Cu or GHK/GHK-Cu more broadly and does not test this finished conditioner. We keep the two separate.
Two kinds of evidence
Lab reportTests one lot of this finished conditioner.
Published researchStudies each peptide more broadly, never this conditioner.
Ex vivoAHK-Cu ingredient research
Experimental hair-follicle research
AHK-Cu was tested in isolated human hair follicles and stimulated follicle elongation under laboratory conditions. That study did not test a rinse-off conditioner, and this product's directions focus application primarily on the mid-lengths and ends rather than the scalp.
Read the full AHK-Cu hair research review
Ingredient research · Pyo et al., 2007 · not this finished productContextGHK peptide research
Research on GHK is not conditioner evidence
GHK and GHK-Cu have a broader research history, including a small human hair study that used GHK peptide as part of a multi-ingredient topical treatment. That study did not test this conditioner, did not isolate GHK-Cu and did not evaluate a 2 to 3 minute rinse-off application.
Ingredient context · Lee et al., 2016 · not this finished productNot yetFinished-product evidence
What has not been clinically established
No controlled human trial has established that this GHK-Cu + AHK-Cu conditioner increases hair count, regrows hair or treats a diagnosed hair-loss condition. The conditioner's primary role is cosmetic conditioning of the hair.
Evidence limitation · finished conditioner not clinically tested for hair growthCertificate of analysis
References · Ingredient research, not studies of this finished conditioner 2
- 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 ↗
Build your copper peptide hair routine
A routine comparison rather than peptide strength: each product does a different job.
This page
GHK-Cu + AHK-Cu Hair Conditioner
$59
$0.98 a day · lasts about 60 days
- Role
- Condition
- Format
- Rinse-off
- Where used
- Mid-lengths to ends
- Contact time
- 2 to 3 minutes
Suits you if you want a rinse-off conditioning step after shampooing for softer, more manageable hair.
A subscription, delivered every 2 months. Pause or cancel any time.
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 time
- 1 to 2 minutes
Suits you if you want the matching 3:1 GHK-Cu + AHK-Cu formula across your cleansing and conditioning steps.
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 time
- Remains on scalp
Suits you if you want the copper peptides in a formula that remains on the scalp rather than being rinsed away.
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 conditioner 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 3,049 mg GHK-Cu and 1,083 mg AHK-Cu.
It is designed as a rinse-off conditioning step for softness, manageability and lightweight moisture after shampooing.
This finished conditioner has not been shown in a controlled human clinical trial to regrow hair. The ingredient research cited for AHK-Cu and GHK does not test this rinse-off conditioner.
That is the current product direction. Conditioner is primarily intended to coat and condition the hair lengths rather than function as a leave-on scalp treatment.
After shampooing, apply evenly from the mid-lengths to ends, leave on for 2 to 3 minutes and rinse thoroughly. The current product directions say to use daily.
The current label directs daily use. Adjust your routine if the product does not suit your hair or if irritation develops.
No. The current formula contains Fragrance (Parfum) and Coumarin.
The current formula contains Yellow 6.
No parabens appear in the current ingredient list.
The conditioner itself does not list sulfate surfactants in its current ingredient list. The matching shampoo uses Sodium C14-C16 Olefin Sulfonate.
Yes. Butyrospermum Parkii (Shea) Butter is listed in the current formula.
Yes. Panthenol, also called Provitamin B5, is included in the current formula.
Yes. Shampoo first, rinse thoroughly, then apply the conditioner from the mid-lengths to ends for 2 to 3 minutes before rinsing.
Yes. Rinse the conditioner thoroughly and then follow the Serum Pro directions separately for that leave-on product.
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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Complete the copper peptide 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.