AHK-Cu copper peptide route for scalp-care and hair-appearance formulas
Nutrition BioTech supplies AHK-Cu copper peptide for B2B cosmetic, scalp-care and hair-appearance formulation review. AHK-Cu is a distinct copper-chelated tripeptide route and should not be treated as a grade of GHK-Cu or labelled as Copper Tripeptide-1. For brand, R&D and procurement teams, we support identity review, assay, copper content, storage guidance, COA, specification sheet, SDS and sample evaluation by product and lot.
| Buyer question | AHK-Cu review point |
|---|---|
| Best-fit use lane | Scalp-care, hair-appearance, localized topical cosmetic concepts and dual copper-peptide systems. |
| Different from GHK-Cu | AHK-Cu and GHK-Cu are related copper peptides, but they are separate ingredients with different identity documents and formulation histories. |
| Documentation package | Request COA, specification sheet, SDS, assay, copper content, heavy metals, microbiology and storage guidance for the exact grade under review. |
| Supplier route | Compare AHK-Cu with GHK-Cu, then request a sample and technical review for your formula format. |
For the commercial route, start with the GHK-Cu and AHK-Cu supplier page. For category context, see copper peptides for formulators, GHK-Cu vs AHK-Cu and the GHK-Cu / Copper Tripeptide-1 guide.
Next step: request the AHK-Cu COA, specification sheet or sample review for your scalp-care or skin-care formulation route.
AHK-Cu is a copper-chelated tripeptide built on alanine-histidine-lysine (Ala-His-Lys). It is a distinct cosmetic ingredient, not a grade or variant of GHK-Cu — the two differ by a single amino acid, and that difference makes them different materials with different formulation histories. In cosmetic practice AHK-Cu is the more specialised of the two copper peptides, most often formulated into scalp and hair-appearance products such as tonics and scalp serums. It is supplied as a cosmetic-grade, water-soluble copper peptide for leave-on and rinse-off topical formats.
A note on labelling identity before you go further: we do not publish an INCI assertion for AHK-Cu. Take the exact INCI name from the specification for the material you are buying — and note that it should not be labelled as Copper Tripeptide-1, which belongs to GHK-Cu. See Labelling identity below.
AHK-Cu at a glance
| Attribute | AHK-Cu |
|---|---|
| Common name | AHK-Cu; alanyl-histidyl-lysine copper; AHK copper peptide |
| Peptide backbone | Alanine–histidine–lysine (Ala-His-Lys), chelated to copper(II) |
| Relationship to GHK-Cu | A different peptide, not a grade of GHK-Cu (glycine vs alanine at position 1) |
| INCI name | Take from the specification for the material you are buying. It should not be labelled as Copper Tripeptide-1. |
| CAS number | Confirm against the specification for your grade; request it with the COA |
| Grade | Cosmetic, topical use (leave-on and rinse-off) |
| Typical category | Scalp and hair-appearance formats; also used alongside GHK-Cu in dual copper-peptide systems |
| Appearance in formula | Tints blue to blue-green at typical cosmetic use levels |
| pH window | Near-neutral; copper peptide systems are generally built around pH ~5.0–6.5. Confirm on the specification. |
| Processing | Controlled temperature, avoid prolonged heat; cold-process incorporation preferred. Confirm the limit on the specification. |
| Use level | Take from the specification for your grade and format. In dual systems AHK-Cu is typically used at a lower level than GHK-Cu. |
| Documentation | COA, specification, HPLC identity and assay, chelation ratio, heavy metals, microbiology, stability, plus third-party laboratory test reports |
Where a row says “confirm against the specification,” that is deliberate. We would rather send you the current document for the exact grade you are evaluating than publish a number that may not match the material in your drum.
What AHK-Cu is, and how it differs from GHK-Cu
AHK-Cu is a different copper peptide, built on alanine-histidine-lysine rather than glycine-histidine-lysine — a one-amino-acid difference that makes it a distinct ingredient, not a grade or variant of GHK-Cu. This is the single most common point of confusion we see from buyers, and it matters commercially: the two materials carry different specifications, different documentation and different labelling identities.
In cosmetic practice, GHK-Cu is the broader, more widely used copper peptide across general skin-appearance systems, while AHK-Cu is the more specialised peptide, most often formulated into scalp and hair-appearance products. Choose on your category, format and documentation needs.
For the full side-by-side comparison — selection criteria, format fit and where each one sits — see GHK-Cu vs AHK-Cu. For the category framework and evaluation criteria, see Copper peptides for formulators.
Skin or scalp: where AHK-Cu fits
As a starting frame: GHK-Cu is the default for facial and body skin-appearance formats (serums, ampoules, creams) where you want the broadly characterised, widely recognised copper peptide. AHK-Cu is most often chosen for scalp and hair-appearance formats (tonics, scalp serums).
Neither is “stronger” in the abstract — they are different peptides with different formulation histories. Decide on category fit, use level, format and the documentation your regulatory team needs. If you are building a scalp line and a face line off one supplier relationship, it is reasonable to evaluate both materials in parallel rather than treating one as a substitute for the other.
Labelling identity: the INCI question
This is the question a regulatory reviewer asks first, so we will answer it plainly rather than bury it.
Take the exact INCI name from the specification for the material you are buying. Your finished-product label is a regulatory document, and the identity on it has to match the material you actually purchased, verified against the current specification for that grade. The specific thing to check: AHK-Cu should not be labelled as Copper Tripeptide-1. That INCI name belongs to GHK-Cu, a different peptide, and the mislabelling does occur in the market.
We deliberately do not publish an INCI assertion for AHK-Cu here. An ingredient identity that turns out not to match the specification is a costly thing to discover at label-approval stage, and a supplier web page is the wrong source of truth for it. Request the current specification and we will confirm what applies to the grade you are evaluating.
By contrast, GHK-Cu’s cosmetic identity is settled and we state it openly: INCI Copper Tripeptide-1, CAS 49557-75-7. See the GHK-Cu material page.
Using GHK-Cu and AHK-Cu together
Yes — dual copper-peptide systems are common in scalp and hair-appearance products, typically pairing a higher-level GHK-Cu with a lower-level AHK-Cu. Because both are copper-chelated peptides, they share similar handling requirements — near-neutral pH, controlled temperature, light protection — which makes them straightforward to co-formulate.
What you need to confirm in your own base: the combined copper load, the total use level across both peptides, and stability of the combined system through your process and shelf life. We can supply both materials and specifications for a side-by-side trial.
One benchmarking caution that applies here: high headline percentages seen on finished products usually refer to a stock solution or dispersion rather than pure peptide, so a competitor claiming a large combined copper-peptide percentage is often not describing pure peptide content at all.
Colour, discolouration and staining
Copper peptides are intensely coloured actives, so colour behaviour is a real formulation consideration rather than an afterthought. At typical cosmetic use levels they tint a formula blue to blue-green. The practical questions are how that reads against your base — a white emulsion will shift noticeably more than a clear serum — how it looks through your chosen packaging, and whether it interacts visually with other pigments or actives in the system.
On skin, at normal leave-on use levels a well-formulated product should absorb without lasting colour, but light-coloured textiles and porous surfaces are the sensible thing to test: run a wear and wash test as part of your stability programme. Build a colour-matching and staining check into your bench trials early — it is much cheaper to solve at bench stage than after a pilot batch.
A related point worth carrying into your QC thinking: colour intensity is not a measure of concentration. How deep a blue looks is driven by optical path length, packaging, background and any other coloured ingredients in the system — none of which are a peptide assay. Colour is useful in the opposite direction: loss of colour signals degradation or copper dissociation, which makes it a practical qualitative integrity check, never a quantitative one.
Handling and storage
Store the raw material cool, dry, sealed and protected from light. In processing, keep temperature controlled and avoid prolonged heat exposure — cold-process or controlled-temperature blending is preferred for copper peptides. For finished formats, amber glass or opaque airless packaging is recommended, since UV exposure accelerates degradation of copper peptide systems. Colour change is your first visual indicator of a handling problem.
Hold the system near-neutral to maintain the copper-peptide chelate. Confirm the exact pH window, use level and temperature limit against the specification for your grade, and validate stability in your actual finished base — supplier handling guidance is a starting point, not a substitute for your own stability programme. Full handling and stability guidance ships with our specification.
Documentation we provide
For copper peptides, the file set is:
- Certificate of Analysis (COA) for the specific batch
- Specification sheet
- HPLC identity and assay
- Copper-chelation ratio
- Appearance
- Moisture
- Heavy metals
- Microbiology
- Allergen statement
- GMO statement
- Stability data
- Third-party laboratory test reports
The last item is the one we would point a QA lead to. Third-party reports mean your QA and regulatory teams are not working from supplier-generated data alone. Certificates are available on request. We also support buyers who want to commission their own independent identity and assay testing — we expect serious buyers to verify, and a practical qualification path is to check that the COA states its assay method and batch, review our third-party reports, run your own independent testing on a sample, then confirm lot-to-lot consistency across more than one batch before you scale.
Tell us the specific material and grade you are evaluating and we will send the file set that applies. See also our quality and certifications page.
Claim boundaries for AHK-Cu finished products
For copper peptides in cosmetics, defensible language stays in appearance territory — for a scalp or hair product, for example, “supports the appearance of fuller, healthier-looking hair.” Language that describes changing skin or hair biology moves a topical product into drug territory in the US.
We deliberately supply claim-boundary guidance alongside our materials rather than marketing copy, because a claim that gets your SKU pulled is more expensive than the ingredient. The fuller discussion, including where the line sits and why, is on the copper peptide pillar page. General information, not legal advice — confirm your specific product, claims and market with your regulatory counsel.
Frequently asked questions
What INCI name should I use for AHK-Cu on a finished product label?
Take the exact INCI name from the specification for the material you are actually buying, and confirm it with your regulatory team before it goes on a label. One thing worth checking specifically: AHK-Cu should not be labelled as Copper Tripeptide-1, which is the INCI name for GHK-Cu, a different peptide. Because labelling identity is a regulatory step rather than a marketing one, we do not publish an INCI assertion for AHK-Cu on this page; request the current specification and we will confirm what applies to the grade you are evaluating.
Will copper peptides discolour my formula or stain packaging and skin?
Copper peptides are intensely coloured actives, so colour behaviour is a real formulation consideration rather than an afterthought. At typical cosmetic use levels they tint a formula blue to blue-green; the practical questions are how that reads against your base (a white emulsion will shift noticeably more than a clear serum), how it looks through your chosen packaging, and whether it interacts visually with other pigments or actives in the system. On skin, at normal leave-on use levels a well-formulated product should absorb without lasting colour, but light-coloured textiles and porous surfaces are the sensible thing to test. Build a colour-matching and staining check into your bench trials early: it is much cheaper to solve at bench stage than after a pilot batch.
At what pH and processing temperature should AHK-Cu be handled?
AHK-Cu is a copper-chelated peptide and shares the handling requirements of that family: hold the system at a near-neutral pH, keep processing temperature controlled and avoid prolonged heat exposure, protect the material and the finished format from light, and store the raw material cool, dry and sealed. Copper peptide systems are generally built in the near-neutral region of roughly pH 5.0 to 6.5 and blended cold or under controlled temperature. Confirm the exact pH window, use level and temperature limit against the specification for the grade you are buying, then validate stability in your own base.
What documentation do you provide for AHK-Cu?
For copper peptides we provide a COA, specification sheet, HPLC identity and assay, copper-chelation ratio, appearance, moisture, heavy metals, microbiology, allergen and GMO statements, and stability data. We also provide third-party laboratory test reports, so your QA and regulatory teams are not working from supplier-generated data alone. Certificates are available on request. Tell us the specific material and grade you are evaluating and we will send the file set that applies.
Request a sample, COA or specification
Samples, a COA and a specification can be requested for evaluation before any commercial commitment. Tell us the material, grade, target format and the volume you are planning, and we will come back with the applicable documentation, MOQ, lead time and pricing for that specific case — these vary by material and grade, so a quoted figure is only meaningful against a real brief.
Contact us to request AHK-Cu documentation →
Nutrition BioTech
1601 W. Mission Blvd, Suite 103 (DL#29), Pomona, CA 91766
Phone: (909) 745-1357
Email: [email protected]