GHK-Cu — Research Evidence & Community Data
Also known as: Copper Peptide, Copper tripeptide-1, Glycyl-L-histidyl-L-lysine copper
Research & educational use only. This content is not medical advice. Consult a qualified healthcare professional before using any peptide compound.
What Is GHK-Cu?
GHK-Cu is a copper-binding tripeptide (glycyl-L-histidyl-L-lysine) found naturally in human plasma, with levels declining with age. It is well studied in topical cosmetic formulations for skin appearance, where human data exist; injectable systemic use is not FDA-approved and is largely preclinical. It is used in research contexts to study skin remodeling and wound repair.
Is GHK-Cu FDA Approved?
GHK-Cu is not fda approved. It is treated as a research compound in the United States with no approved human clinical applications.
What Does the Research Show?
As of 2026, there are 3 human randomized controlled trials with a combined 120 subjects, and 50 animal model studies. Multiple small human studies support topical cosmetic benefits (skin firmness, fine lines). Systemic injectable claims rest on animal and in-vitro data.
| Study | Type | Subjects | Outcome | Source |
|---|---|---|---|---|
| GHK peptide as a natural modulator of multiple cellular pathwaysPickart L, Margolina A. · Oxidative Medicine and Cellular Longevity · 2015 | Review | — | Reviews skin remodeling and gene modulation | DOI |
What Do Community Logs Show?
No community logs include GHK-Cu yet. Browse community logs →
How Is GHK-Cu Used in Research?
Mechanism of action. Copper delivery and modulation of genes involved in tissue remodeling, antioxidant response, and collagen synthesis.
Half-life. Short systemic half-life; topical effects are formulation-dependent.
Storage. Stable as a powder; topical solutions kept cool and dark.
Reconstitution. Topical cosmetic use is the evidenced route. Injectable reconstitution math only — not medical advice. See the reconstitution calculator — a math tool only, not dosing guidance.
What Does GHK-Cu's Evidence Tier Mean?
GHK-Cu is rated Tier 2 · Observational. Supported by human observational or clinical reports. Evidence tiers are a shorthand for how strong the human data is — Tier 1 reflects human randomized controlled trials, while lower tiers rest on observational, animal, or theoretical evidence. A higher tier means more confidence that observed effects are real and caused by the compound rather than by chance or bias. For how to weigh each tier, see our guide to understanding peptide evidence tiers.
How Do You Evaluate GHK-Cu Sourcing and Quality?
Because research-chemical GHK-Cu is unregulated, sourcing quality varies widely between sellers. Before trusting any supplier, check its reputation and enforcement history in the ranked list of trusted peptide sellers, and look for a batch-specific certificate of analysis (COA) showing third-party HPLC or LC-MS purity testing. Purity claims without a named lab, a batch number, and a method are marketing, not data. If you are reconstituting lyophilized material, the reconstitution calculator handles the arithmetic — it is a math tool only and not dosing guidance.
Where to Buy GHK-Cu: Trusted & Verified Sellers
GHK-Cu is supplied by specialist research-chemical sellers rather than pharmacies, so where you buy it matters as much as what you buy. The sellers below have published moderator-approved third-party lab results for GHK-Cu, ranked by overall reputation score. Always confirm a current batch-specific COA before purchasing.
PeptidesHub does not sell GHK-Cu or facilitate transactions — this list is for research transparency only.
How Are Adverse Reactions to GHK-Cu Reported?
Structured adverse-event reports help the whole community spot safety signals early. You can browse approved reports on the adverse events page or submit one yourself. For a serious or life-threatening reaction, seek medical care and report it to FDA MedWatch.
Frequently Asked Questions
GHK-Cu is not fda approved. It is treated as a research compound in the United States.