Does Topical GHK-Cu Work? What the Evidence Shows

Is GHK-Cu FDA approved?

No. There is no FDA approved GHK-Cu drug. Topical GHK-Cu is on the FDA's Category 1 list of bulk substances, which means pharmacies may compound it under current FDA policy while the substance is evaluated. Category 1 is not approval. Stackhaus Health offers topical GHK-Cu cream only, not injectable GHK-Cu.

Source: [5].

Compounded medications are not FDA approved. FDA does not review compounded drugs for safety, effectiveness or quality [4]. A licensed provider decides whether a compounded cream is appropriate, and research on topical GHK-Cu is limited and mostly early-stage.

What is GHK-Cu?

GHK-Cu is a small peptide made of three amino acids, glycine, histidine and lysine, bound to a copper ion. GHK is found naturally in human plasma, saliva and urine, and blood levels are reported to decline with age. Copper peptide ingredients have been used in cosmetic skin care products for years.

Source: [2].

Does topical GHK-Cu work?

The evidence is limited. Much of what is written about GHK-Cu comes from cell studies, animal studies and gene-expression data. These describe what GHK-Cu does in a dish or in an animal model. They do not show what a cream does on human skin, and well-designed human trials of topical GHK-Cu are scarce.

Source: [1]. Here is what the published evidence does not show:

• There are no large, independent, placebo-controlled human trials of a topical GHK-Cu cream that we could find.
• Much of the review literature comes from researchers affiliated with a company that sells copper peptide products [1][2]. That does not make it wrong. It is context worth knowing.
• No study we found shows that a compounded GHK-Cu cream produces any specific result in people.

Not having large trials does not prove a cream cannot help. It means the question has not been answered well in published research.

Can GHK-Cu get through the skin?

This is an open question. GHK-Cu is water-loving, and the outer layer of skin, the stratum corneum, is a fatty barrier. A 2025 review found that GHK-Cu has limited permeation through that layer and that ways to measure it are still being developed. Research on carriers such as liposomes is early.

Source: [3].

How is a prescribed compounded cream different from an OTC copper peptide product?

Copper peptide serums and creams sold over the counter are cosmetics. A compounded GHK-Cu cream is a prescription medication, prepared by a state-licensed pharmacy for one patient after a licensed provider reviews their intake. These are factual differences in how each is made and sold, not a claim that one works better.

• Who prepares it: a compounded cream is prepared by a licensed pharmacy for a specific patient. Stackhaus Health prescriptions for GHK-Cu cream are prepared by Emerald Hills Pharmacy, a state-licensed 503A pharmacy in Florida.
• Who decides: a licensed provider reviews your health history before anything is prescribed. Cosmetics are self-selected.
• Rules that apply: compounding pharmacies follow state pharmacy rules and federal compounding law. Cosmetics follow cosmetic rules and cannot claim to treat any condition.
• What it is not: compounded medications are not FDA approved. FDA does not review compounded drugs for safety, effectiveness or quality [4]. A prescription does not mean the product has been shown to work better than a cosmetic.

Talk to your provider first. Tell your provider about all medications, supplements, allergies and skin conditions, any known copper sensitivity, and whether you are pregnant or breastfeeding. Your provider decides whether the cream is appropriate and how to use it. Follow your prescription label.

How does it work at Stackhaus Health?

You complete a free online intake about your skin goals and health history. A licensed provider reviews it and decides whether compounded GHK-Cu cream is appropriate. Completing the intake does not guarantee a prescription. If it is prescribed, Emerald Hills Pharmacy, a state-licensed pharmacy, prepares and ships your cream.

See the topical GHK-Cu cream, our skin care treatments, our pharmacy network and our editorial policy.