Peptide Academy · Cosmetic

AHK-Cu

Also known as Ala-His-Lys copper peptide

Save to Pinterest

Educational research summary, not medical advice. Many compounds here are not approved for human use. Talk to a licensed clinician before making any health decision.

The Peptide Academy is free to read. Members also get the research protocols for AHK-Cu, dose and vial tracking, and an AI Advisor with cited sources. Try it all free for 7 days, no card needed.

Start my free 7-day trial

What is AHK-Cu?

A copper tripeptide studied primarily for hair follicle stimulation and androgenetic alopecia.

How it works

Stimulates dermal papilla cell proliferation and VEGF expression while reducing follicle apoptosis in culture studies.

Published research

  • In-vitro and small cosmetic studies on hair growth; less studied than GHK-Cu

Half-life

Short — minutes to hours (topical cosmetic peptide)

Cautions

Cosmetic-grade evidence; not for systemic use.

Side effects & fixes

Common side effects

  • —Redness, itching or a small welt at the injection site
  • —Mild nausea, dizziness or headache after dosing
  • —Tiredness or lethargy (reported with TB-500)
  • —Stinging on injection with copper-peptide (GHK-Cu) blends

Histamine reactions

Fairly common at the site: itchy, raised welts that appear within minutes and fade within hours. Larger or spreading reactions are less common.

Common fixes

  • Rotate injection sites (abdomen, thighs, upper arms) and stay at least an inch from the last spot.
  • Let the alcohol swab dry fully, let the solution reach room temperature, and inject slowly with a fresh needle.
  • A cold compress for 5–10 minutes eases a red or itchy welt; it should fade within a day.
  • For blends containing GHK-Cu, more bacteriostatic water per vial (a more dilute solution) and a slower injection reduce stinging.
  • For mild itching, redness or flushing, a non-drowsy over-the-counter antihistamine (such as cetirizine or loratadine) is commonly used — check with a pharmacist first, especially if you take other medicines.
  • Take with a light snack if dosing causes nausea or dizziness.

Stop and get help

  • Spreading redness, warmth, pus or fever at a site (possible infection).
  • Anyone with current or past cancer should talk to a doctor first — these compounds affect blood-vessel growth.
  • Stop and get emergency help for swelling of the face, lips, tongue or throat, trouble breathing, widespread hives, chest pain or fainting.

Basis: Limited human data plus consistent community reports; animal research for mechanisms. Educational only, not medical advice.

Medication concerns

Theoretical: no human interaction studies

  • Copper-chelating medicines (penicillamine, trientine) and Wilson's disease

    GHK-Cu delivers copper; avoid it if your copper must be kept low.

  • Topical vitamin C, retinoids and acids

    Vitamin C can bind copper; retinoids and acids may add irritation. Apply at different times.

  • Blood thinners (warfarin, apixaban, rivaroxaban) and antiplatelets (aspirin, clopidogrel)

    Injections bruise and bleed more easily on these. Use fine needles, apply pressure, and report unusual bruising.

  • Everything else you take, including supplements

    Bring a full list of medicines and supplements to your pharmacist or clinician before starting.

Basis: No interaction studies; concerns follow from copper delivery and skin-care chemistry. Educational only, not medical advice. Never stop or change a prescribed medicine without your prescriber.

Protocols & tracking are members-only

Members see the research protocols for AHK-Cu, plan schedules, track every dose and vial, and ask the AI Advisor questions with cited sources. Try every Researcher feature free for 7 days, no card needed.

Start my free 7-day trial Reconstitution calculator

More cosmetic compounds

Acetyl Tetrapeptide-3
Acetyl Tetrapeptide-5
Argireline
Biotinoyl Tripeptide-1
Botulinum Toxin
Decapeptide-4
Browse all compounds in the Peptide Academy →