GHK-Cu Copper Peptide: What the Research Shows

At a glance

What it isA small peptide made of three amino acids (glycine, histidine, lysine) bound to copper. Also called copper tripeptide-1.

Studied forSkin and wound repair, mostly with creams and serums.

Human evidenceLimited. Small trials of topical products. No clinical data supporting use for joint or tendon problems.

FDA statusNot an approved drug. Injectable forms carry an FDA safety warning. Non-injectable forms are on FDA’s Category 1 list for compounding, and FDA plans an advisory committee review.

SportNot named on the World Anti-Doping Agency’s 2026 Prohibited List. Athletes should check with their own anti-doping agency.

Last reviewed October 12, 2026. Regulatory status for these substances has been changing, so we re-check this page and update the date.

What the research shows

Most of the research is on skin. Review articles describe laboratory findings that GHK-Cu affects many cell pathways involved in skin repair. ^[1] Reviews are not the same as trials, and some of the authors of the best-known reviews have long worked on GHK-Cu.

The human trials we found were small and used topical products. In one randomized trial of skin care with or without GHK-Cu after laser skin resurfacing, 13 people completed the study. Computer analysis and blinded evaluators found no statistically significant difference between the groups in how fast redness resolved, and no difference in wrinkle improvement. Patients who used GHK-Cu did rate their overall skin quality improvement higher on a questionnaire. ^[2]

A 2026 systematic review of 64 records concluded that the human literature remains “thin and fragmented”: most randomized trials are small and were done on facial cosmetic creams. ^[3] A 2026 review of injectable peptides for orthopaedic use found no clinical data supporting GHK-Cu for musculoskeletal conditions. ^[4]

What is still unknown

Whether GHK-Cu taken by mouth, including in liposomal form, has any effect in people. We found no human studies of oral or liposomal GHK-Cu.
Whether it helps joints, tendons or other tissues beneath the skin.
The safety of injected GHK-Cu. FDA says compounded injectable GHK-Cu may pose a risk of immune reactions, and that there are limited data in humans.

Where it stands with FDA and in sport

FDA has not approved any drug that contains GHK-Cu. For injectable forms, FDA warns that compounded drugs containing GHK-Cu “may pose risk for immunogenicity” and that there are “limited data in humans to inform safety-related considerations.” ^[5]

For non-injectable forms, FDA’s list of bulk substances that pharmacies may compound under section 503A placed GHK-Cu in Category 1 as of May 2026, and FDA said it intends to consult its advisory committee before the end of February 2027. ^[6]

The product

Quicksilver Scientific Oral Liposomal Copper GHK

Quicksilver Scientific sells an oral liposomal liquid, 1 mL per serving, 30 mL bottle. Its Supplement Facts panel lists copper at 0.5 mg per serving, “from 5 mg GHK-Cu Copper Tripeptide-1.”^[7]

It is sold as a dietary supplement, not an FDA-approved drug. We are not aware of published human studies of oral or liposomal GHK-Cu.

Quicksilver also sells a topical Copper GHK+ facial serum. That is a skincare product and a different category.

If you are curious about this product, talk with a KOI clinician first. We review your history, your medications and your labs, and we will tell you plainly what is known and not known.

Sources

Good to know

Does copper peptide work for skin?

Small human trials of creams exist, with mixed results. One randomized trial of 13 people after laser resurfacing found no significant objective difference between groups, though patients using GHK-Cu rated their skin quality higher. Larger, better trials are still needed.

Is injectable GHK-Cu safe?

FDA has warned that compounded injectable GHK-Cu may pose a risk of immune reactions, and that human safety data are limited.

Go deeper

Explore the Ēnel Health Peptide Atlas

Ēnel Health publishes a free library of peptides, with each compound graded on the human evidence that exists and every entry cited to its sources.

Explore the Peptide Atlas

Not sure what makes sense for you?

Start with a free 15-minute consult. A KOI clinician will review your history, your medications and your labs before anything else.

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This page is for education. It is not medical advice and does not replace care from a licensed clinician.

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