What is the half-life of AHK-Cu?

AHK-Cu has an approximate elimination half-life of 30 min. Very short-acting — protocols dose 1–2× a day.

How long does AHK-Cu stay in your system?

Roughly 97% of a dose has cleared after five half-lives — about ~3 h for AHK-Cu. That is the window that matters for washouts, bloodwork and surgery.

AHK-Cu is typically administered by the subcutaneous route. Cosmetic: topical daily. Research subq: ~1 mg daily.

What are the risks of AHK-Cu?

Limited human evidence; topical use has the most support Skip if copper-sensitive Injectable carries irritation/allergy risk

AHK-Cu

ahk copper

Copper tripeptide focused on hair and scalp. Comparison with GHK-Cu; tracking hair/skin changes.

Half-life: 30 min
Out of system: ~3 h
Route: Subcutaneous
Level: Beginner

Very short-acting — protocols dose 1–2× a day. After the last dose, roughly 97% has cleared in ~3 h (five half-lives) — the window that matters for washouts, bloodwork and surgery.

What AHK-Cu is used for

Copper tripeptide focused on hair density and scalp health
Complements GHK-Cu for skin/hair protocols

How it's typically used

Cosmetic: topical daily. Research subq: ~1 mg daily.

What to watch for

Limited human evidence; topical use has the most support
Skip if copper-sensitive
Injectable carries irritation/allergy risk

Common questions

What is the half-life of AHK-Cu?: AHK-Cu has an approximate elimination half-life of 30 min. Very short-acting — protocols dose 1–2× a day.
How long does AHK-Cu stay in your system?: Roughly 97% of a dose has cleared after five half-lives — about ~3 h for AHK-Cu. That is the window that matters for washouts, bloodwork and surgery.
How is AHK-Cu taken?: AHK-Cu is typically administered by the subcutaneous route. Cosmetic: topical daily. Research subq: ~1 mg daily.
What are the risks of AHK-Cu?: Limited human evidence; topical use has the most support Skip if copper-sensitive Injectable carries irritation/allergy risk

About Skin, hair & aesthetic

What they are: Skin, hair, and pigmentation compounds — some injected, some formulated into topicals.
How they're run: Topicals go on clean skin daily; injectables run in short courses. Either way the timescale is months.
What to watch: Melanocortin compounds darken existing moles and can trigger nausea and flushing — get a skin check before and during. Topical peptides are cosmetic and act only where applied.

Full guide

AHK-Cu: A Tracking Guide for a Copper Tripeptide

What AHK-Cu is, how it compares to GHK-Cu, and how to track hair, scalp, and skin changes if you choose to use it.

Other skin, hair & aesthetic

Peptid AI is an educational and self-tracking tool — not a medical service, and not a vendor. Nothing here is medical advice, a prescription, or an endorsement. Doses reflect what is commonly reported in research literature; they are not recommendations. Many compounds listed are experimental, not approved for human use, and/or controlled substances that are illegal to possess without a prescription in many countries. Always consult a qualified physician before starting, changing, or stopping any protocol.