GHK-Cu (copper peptide)
Copper tripeptide-1, GHK copper
Forms: Creams and serums (cosmetic ingredient 'copper tripeptide-1') and injectable 'research' powder.
A natural copper-binding tripeptide found in blood plasma and widely used in skincare. Injecting it, as done in sport and anti-aging circles, is untested.
Legal status: Cosmetics are sold freely; injectables are unapproved. Not on the 2026 WADA List (USADA calls GHK a permitted cosmetic peptide); the 2027 List adds unapproved peptides to S0.
What it gives
What people use it for and what the sources report. Strength is a general category from the literature: mild, clear or strong.
Purpose
Applied to skin for repair, wrinkles and hair; injected for 'healing', recovery and anti-aging. Evidence comes from lab, animal and small cosmetic skin studies; there are no clinical trials of injections.
What people seek and what studies show
People hope for firmer skin, fewer fine lines and thicker hair, and from injections for repair and 'rejuvenation'. GHK blood levels fall with age. In cell and animal studies it raises collagen production, draws repair cells to wounds and speeds healing; small cosmetic studies of creams report firmer, denser skin and fewer fine lines. Gene 'reset' claims rest on cell data; what injections do in the body is unknown.
Effects
Evidence: Limited human data — some human studies, small or short
Sought effects by goal (as reported)
Possible side effects
Possible does not mean certain: whether they appear depends on dose, duration, individual response and monitoring. Below — what to watch for and how to notice it early.
3 possible side effects
level · how often it is reportedWhat the levels mean
Level: general category from the literature, not your personal risk
How often
- common
- reported often
- possible
- reported in some people
- rare
- reported occasionally
How to lower the risks
General ways to lower the chance of each side effect. No measure removes a risk completely.
Products obtained without a prescription are often fake, mislabeled or non-sterile, and there is no way to check at home. For legal supplements, look for third-party testing (Informed Sport, NSF).
What is unknown cannot be lowered, only avoided; tell your doctor what you have taken.
Low-level side effects
Check-ups and blood tests
Which tests and check-ups to do and when. This is a guide — agree the exact schedule with your doctor.
Which doctors can help
Myth & fact
“Copper peptide injections rejuvenate the whole body.”
Anti-aging claims rest on cell, animal and skin-cream studies; no clinical trial has tested injected GHK-Cu.
Combinations
No specific combination notes for this substance yet. The stack check still adds up side effects that several substances share.
Sources
Possible side effects by body system, combinations, how to lower the risks and which tests to do — free.
Open the stack check