▶ GHK-CU · SUBTOPIC · SAFETY PROFILE
GHK-Cu Safety Profile
For Laboratory Research Use Only. This page summarises observed adverse events and regulatory status reported in the peer- reviewed literature. It is not medical advice and does not recommend any human use of GHK-Cu.
OBSERVED ADVERSE EVENTS IN LITERATURE
The following adverse events have been observed in trials or animal studies of GHK-Cu. Severity, frequency, and attribution depend on the source publication.
- Localized erythema (injection site)
- Transient hyperpigmentation (topical, in some users)
- Rare contact dermatitis
DRUG INTERACTIONS
The following interactions are reported in or theorised from the published mechanism for GHK-Cu.
- Vitamin C (theoretical · copper-ascorbate redox cycling)
- Retinoids (may potentiate irritation when stacked topically)
CONTRAINDICATIONS REPORTED IN LITERATURE
Contraindications recorded for GHK-Cu in the published record:
- Wilson's disease (copper-accumulation disorder)
- Active malignancy at the local site (theoretical, due to angiogenic activity)
FDA REGULATORY STATUS
Topical GHK-Cu formulations are marketed as cosmetic ingredients under FDA cosmetic regulation (cosmetics generally do not require FDA premarket approval). Injectable forms are research-use only.
WADA REGULATORY STATUS
Not listed on the WADA Prohibited List (2026).
SAFETY Q+A FROM LITERATURE
▶ Is GHK-Cu FDA-approved?
Topical GHK-Cu is regulated as a cosmetic ingredient (no FDA premarket approval required for cosmetics). Injectable formulations are not FDA-approved for any human indication and are supplied as research-grade chemical reference compounds.
▶ Is GHK-Cu banned by WADA?
GHK-Cu is not currently on the WADA Prohibited List as of the 2026 publication.
▶ Is GHK-Cu safe in pregnancy?
Not studied in pregnancy or lactation. Research-grade GHK-Cu is supplied for in-vitro use only; no human dose is recommended.
CITED LITERATURE
The safety statements above are drawn from the following peer-reviewed sources. Refer to the originals for adverse- event tables, attribution, and full context.
- Pickart L. The human tri-peptide GHK and tissue remodeling. J Biomater Sci Polym Ed 2008. PMID 18644225. link
- Pickart L, Vasquez-Soltero JM, Margolina A. The human tripeptide GHK-Cu in prevention of oxidative stress and degenerative conditions of aging. Oxid Med Cell Longev 2012. PMID 22666519. link
- Pickart L, Margolina A. Regenerative and protective actions of the GHK-Cu peptide in the light of the new gene data. Int J Mol Sci 2018. PMID 29986520. link
- Canapp SO Jr, et al.. The effect of topical tripeptide-copper complex on healing of ischemic open wounds. Vet Surg 2003. PMID 14648531. link
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▶ LAST UPDATED · 2026-05-19