If a supplied lot fails agreed specifications, we’ll replace it at no cost or refund its purchase price in full.
Quality test failed? Free replacement or full refund.
Off-spec? Free replacement or full refund.
Why Cu²⁺ : Peptide Ratio Matters — A 90-Second Quality Check for Formulators. Read our briefing →
Why Cu²⁺ Ratio Matters — a field guide. Read →
On the Cu²⁺ ratio. Read →
Copper tripeptide-1
GHK-Cu lot documentation
Review the offered GHK-Cu lot’s COA and discuss the copper-ratio, UV-Vis, colour, or pH-stability data required by your specification. Sales will confirm the applicable standards, available reports, and any additional testing before quotation.
Overview
GHK-Cu is a copper complex of Gly-His-Lys (Copper Tripeptide-1, CAS 89030-95-5). It is supplied as a blue lyophilized powder for cosmetic formulation and research. The copper complex and the free GHK peptide have different analytical characteristics, including the visible absorption associated with copper coordination. Ask sales for the COA matching the offered or supplied lot. Copper-content, Cu²⁺ : peptide ratio, UV-Vis, colour comparison, and stability work can be discussed against your agreed written specifications. Sales will confirm the available records, applicable standards, and scope of any additional or third-party testing before quotation. We supply gram-scale lots for chemistry-validation work and kilo-scale campaigns for ingredient houses. Read our Cu²⁺ : peptide ratio field note for more on the analytical questions to consider.
Who buys this, and why
Cosmetic-peptide buyers fall into two groups: established beauty / med-aesthetic brands extending an existing line, and private-label clients building a catalog from scratch. The first group usually wants lyophilized peptide material plus stability data in their existing carrier matrix; the second usually wants a finished formulation under their label. Both need INCI naming verified, regulator-specific safety files (CPNP for EU, FDA OTC monograph for US where relevant), and packaging-compatibility data.
Primary buyer fit: medical aesthetic clinics and med spas, regional distributors and re-sellers, and academic and contract research laboratories.
Applications & buyer fit
GHK-Cu is evaluated for cosmetic serums, creams, and scalp-care products. Finished-product safety and claims remain the brand’s responsibility under its destination-market rules.
Anti-aging face serums & ampoules
GHK-Cu (Copper Tripeptide-1) is used in leave-on serums and concentrated ampoules, with compatibility and pH confirmed during formulation development.
Brightening & barrier-support creams
Co-formulated with niacinamide and hyaluronic acid, both documented as compatible base companions for the copper-peptide complex.
Eye and targeted-zone treatments
Low-use-level, high-care formats where lot-to-lot colour and coordination consistency keep a premium finished product visually and chemically stable.
Scalp-care cosmetic serums & tonics
Used as a cosmetic active in leave-on and rinse-off scalp formats — described as cosmetic care, with no medical or hair-growth claim on our side.
Specifications
Documentation available on request
Regulatory note
GHK-Cu is supplied as a cosmetic-grade INCI ingredient (Copper Tripeptide-1), not for compounded human-use preparations, it is not on the FDA July 2026 PCAC 503A-bulks agenda. Cosmetic-grade material available for med-spa, beauty private-label brands, and finished-product formulators worldwide; INCI name supplied on SDS for cosmetic-notification workflows (CPNP in EU, equivalent registries elsewhere).
Frequently asked questions
We hold a copper-saturated GHK reference and run two orthogonal measurements when that item is included in the agreed batch scope: atomic absorption for total copper mass on the peptide, and reversed-phase HPLC with diode-array detection to verify a single coordinated peak rather than free peptide plus separate copper salt. Pure 1:1 stoichiometry is the target; the measured ratio and its deviation from 1:1 are available on request and listed on the COA when tested, so an ingredient-house QC group can decide whether the lot fits the spec they hold internally. Lots that drift outside our internal control band are rejected before they ever cross into commercial inventory.
Where UV-Vis verification is included in the agreed analytical scope, the lot is reconstituted to a defined concentration in copper-clean water and scanned across the visible region. The diagnostic feature is the broad d-d band near 606 nm — for GHK-Cu it is the molecular fingerprint of square-planar Cu(II) sitting in its His/N-terminus pocket. We log the peak λmax and the absorbance height, then compare the powder against a Pantone-anchored master swatch under D65 illumination and report a CIELAB ΔE figure. ΔE drift above an agreed threshold triggers a copper-content re-test and a hold, because the colour shift is upstream of any other QC signal a customer will run.
Contact sales to confirm the stability records available for the offered product and lot. Share the formulation matrix, storage conditions, time points, and applicable standard your project requires. Any additional stability work or third-party report is confirmed in the agreed written specifications before quotation.
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