AHK-Cu is a copper-binding tripeptide — alanine-histidine-lysine complexed with copper(II) — and the lesser-studied sibling of GHK-Cu. Most buyer interest centers on hair: the research that exists describes AHK-Cu stimulating the cells at the base of the hair follicle in a dish. It is sold as a research powder, not a finished cosmetic, and that distinction shapes how to shop for it.
Ion Peptide, a recommended vendor we track, stocks AHK-Cu. It sells it as lyophilized research powder rather than a pre-mixed serum, at $63-$65 per listing. This guide covers how the listings compare, how to read a certificate of analysis (COA) for a copper peptide, and what to check before paying — written to report what's verifiable, not to push a single SKU.
Research-context information only. AHK-Cu is a research peptide. Protocols, doses, and reactions reported below come from published research and self-reported community sources. This article reports what has been documented, not what should be done. Consult a licensed physician for personal medical decisions.
Understanding AHK-Cu Pricing
AHK-Cu pricing is narrow. Ion Peptide lists AHK-Cu at $63 and a separate AHK-Cu Raw 1 g at $65. The few-dollar spread between listings is smaller than the variation a coupon code can produce, so the headline price is rarely the deciding factor.
What actually changes the per-milligram math is quantity. A 1 g raw listing contains far more peptide than a small cosmetic-style vial, which is why the raw powder is the format community sources tend to favor for making a scalp or skin serum — it stretches across many preparations. Because AHK-Cu is sold as a research chemical and not a regulated consumer good, there's no retail "MSRP" to anchor against; the research-chemical market sets the floor, and these listings sit close to it.
A caveat on copper-peptide pricing generally: a suspiciously cheap copper peptide is worth more scrutiny, not less. Copper complexation and lyophilization add cost, and a price well under the prevailing band can signal under-filled vials or an uncomplexed peptide. The listings here sit in the expected range rather than below it.
How to Verify AHK-Cu Quality
A certificate of analysis is the single most useful document when buying any research peptide, and copper peptides add a wrinkle worth understanding. The COA should report identity (mass spectrometry confirming the Ala-His-Lys sequence) and purity (typically by HPLC). For a copper complex, the meaningful question is whether the peptide is actually complexed with copper(II) — a properly prepared AHK-Cu powder carries the characteristic blue-to-violet color of a copper-peptide complex, and a COA or product page that addresses copper content is stronger than one that reports the peptide alone.
Practical COA checks: confirm the batch number on the certificate matches the vial, that the test date is recent, and that the issuing lab is identified rather than anonymous. HPLC purity figures in the high-90s percent are the norm for reputable research-peptide listings. A vendor that publishes per-batch COAs rather than a single generic certificate is demonstrating ongoing testing rather than a one-time sample.
The vendors we track are included specifically because they meet our COA and reputation floor. The methodology section below explains how that floor is set.
100mg · sold research-use-only · we may earn a commission
Choosing the Right Vial Size
The main format decision with AHK-Cu is raw powder quantity rather than a true "vial size" choice. Ion Peptide's AHK-Cu Raw is a research-powder listing; Ion's plain AHK-Cu listing is also a powder rather than a finished serum.
The larger raw quantity (Ion's 1 g listing) suits buyers who plan to make multiple batches of a topical preparation over time, since a single gram of peptide divides across many serum mixes. A smaller listing is enough for a single trial preparation or for someone testing tolerance before committing to more. Community sources that document making a scalp serum generally start from a raw powder for exactly this reason — it gives control over the final concentration. The accompanying dosing guide covers how those topical concentrations are described.
Ion Peptide does not sell AHK-Cu as an injectable, and community use of AHK-Cu is topical rather than injected — so the "vial size" framing common to injectable peptides applies loosely here. The relevant variable is how much powder you're buying and at what purity.
Vendor Evaluation Methodology
Every vendor on this site is scored on a transparent formula: price (40%) + COA availability and quality (30%) + reputation (30%), with a floor of 8.0. If a vendor is listed as recommended, it has cleared that floor — the ranking orders vendors that are all already considered legitimate.
For AHK-Cu specifically, Ion Peptide is a recommended vendor. Its listings sit in a narrow $63-$65 band, so the choice comes down to which listing format (raw quantity) and which active coupon produces the better effective price at checkout.
The live comparison card below pulls each vendor's current AHK-Cu offer, including any active discount, so the effective prices are accurate at the time of reading rather than frozen at publication.
Shipping and Storage
Lyophilized AHK-Cu powder is stable at room temperature for short periods but is best kept cold and dark for longer storage — copper peptides are sensitive to light and oxidation, and the freezer extends shelf life of the dry powder. Once reconstituted into a serum, a copper-peptide solution is far less stable and is generally kept refrigerated and used within a shorter window; community sources making small batches typically mix only what they expect to use.
The vendors we track ship domestically, and shipping cost and speed vary by promotion rather than being fixed. Because the powder travels well dry, transit temperature is a smaller concern for AHK-Cu than for peptides that must stay cold in transit. The reconstitution math and storage specifics for a finished preparation are covered in the dosing guide.
Bac Water Made for Peptides
Don't risk a $300 peptide on generic bac water.
Most cloudy reconstitutions trace back to one thing — and it isn't the peptide. Sterile, non-pyrogenic, 0.9% benzyl alcohol — formulated for peptide reconstitution, not repackaged from generic stock.
✓ 0.9% benzyl alcohol✓ Made for peptides✓ 30 mL multi-dose
What's the difference between AHK-Cu and AHK-Cu RAW?
RAW refers to the unformulated research powder, sold by milligram quantity for the buyer to reconstitute and prepare. Some listings labeled simply AHK-Cu are also raw lyophilized powder rather than a finished serum. The vendors we track sell research powder, not a ready-to-apply cosmetic; the labels differ but the product is a copper-peptide powder intended for research handling. Check each product page for the stated quantity (e.g. 1 g) and purity rather than relying on the label alone.
How much should AHK-Cu cost?
Ion Peptide, a recommended vendor we track, lists AHK-Cu at $63 and a 1 g AHK-Cu Raw at $65. COA availability and quantity per vial matter more than a few-dollar price difference. AHK-Cu is sold for research use and is not a regulated consumer product, so prices reflect the research-chemical market rather than cosmetic retail.
Related Guides
AHK-Cu Dosing Guide — how topical preparation and concentration are described
AHK-Cu Benefits — what the hair and skin research actually shows
