Legal status · United States
Is GHK-Cu with zinc thymulin legal in the United States?
Written by Aaron CuhaReviewed Sep 2026
Direct answer
GHK-Cu with zinc thymulin can be sold in the United States as a supplement or cosmetic ingredient. Its legal category is "Permitted in cosmetics". That is not approval as a drug. FDA has not checked any health claim made for it. Versions you inject, and "research use only" versions, fall outside supplement rules, so that label does not make them legal to use in people. On the evidence, 1 completed human trial is cited on its profile.
- People given it
- 13
- Found nothing
- 1
Legal category
Permitted in cosmetics
Sold as a cosmetic serum, or as a pharmacy-mixed product for the skin. Not an approved treatment for hair loss. Claiming it regrows hair would make it a drug claim.
Reviewed Sep 2026. This is a legal category, not legal advice.
A "research use only" label on a vial does not make it legal to use on people.
GHK-Cu with zinc thymulin in the United States at a glance
| Legal category | Permitted in cosmetics |
|---|---|
| Note | Sold as a cosmetic serum, or as a pharmacy-mixed product for the skin. Not an approved treatment for hair loss. Claiming it regrows hair would make it a drug claim. |
| FDA approval status | Sold as a cosmetic, or as a skin product mixed by a pharmacy. Neither part is an approved drug for hair loss. The approved drug you put on the scalp for pattern hair loss is minoxidil. |
| Studies in people | 2 of 5 sources on the profile |
| Reviewed | Sep 2026 |
The legal category and note come from the GHK-Cu with zinc thymulin profile. We checked them against U.S. Food and Drug Administration (FDA) listings on the reviewed date.
What this means
- 01
GHK-Cu with zinc thymulin can be sold in the United States as a supplement, food or cosmetic ingredient, under the legal category above. It has no approval as a drug.
- 02
Being sold as a supplement means FDA has not checked any health claim. The makers are responsible for safety and labels, and quality varies from product to product.
- 03
Versions you inject, and "research use only" versions, are not supplements. That label does not make them legal to use in people, and anything you inject falls under the rules for medicines.
What GHK-Cu with zinc thymulin is
A pharmacy-made scalp serum in a dropper bottle. It usually has 5 mg/mL of copper peptide with 10 micrograms/mL of zinc thymulin. So there is 500 times more copper peptide than thymulin. Neither ingredient has a proper study for hair growth in people. The mix has never been tested. The hair evidence for thymulin is human hair roots in a dish.
Hair loss clinics and pharmacies sell this as a leave-on scalp serum, usually in a 25 mL dropper bottle. The usual strengths are GHK-Cu 5 mg/mL with zinc thymulin 10 micrograms/mL.
How it works: GHK-Cu carries copper into tissue. In a dish and in rat wounds it pushes cells to make collagen and other building materials.
Approval history: Sold as a cosmetic, or as a skin product mixed by a pharmacy. Neither part is an approved drug for hair loss. The approved drug you put on the scalp for pattern hair loss is minoxidil.
How FDA treats this kind of product
Approves prescription drugs, each for a named use. It also acts against unapproved products, including peptides sold online. Compounding pharmacies, which mix drugs to order, may make some compounds with a prescription. That only applies when the FDA puts the compound in a category of bulk ingredients it allows.
The legal category above is how The Longevity Archive reads U.S. Food and Drug Administration listings for GHK-Cu with zinc thymulin on the reviewed date. It is not a legal opinion. Rules change. Bringing a compound into the country, prescribing it and owning it can each be treated differently. Check with the agency before you act on anything here.
GHK-Cu with zinc thymulin in sport and the military
Whether GHK-Cu with zinc thymulin is banned in sport is set by the World Anti-Doping Code and by military rules, not by its legal status in the United States. Before you compete or get tested, look up GHK-Cu with zinc thymulin by name on the Prohibited List, or look up a named product in Global DRO. Under the World Anti-Doping Code, category S0 bans, at all times, any drug-like substance that meets two tests. No other section of the List covers it. And no government health regulator anywhere has a current approval for it as a treatment in people. Many substances that are approved somewhere are banned by name in another section. So approval does not mean a substance is allowed in sport.
- WADA Prohibited List
- Global DRO (check a named product)
- USADA (US athletes)
- Operation Supplement Safety (US service members)
The rules you compete or serve under decide this, not this page.
GHK-Cu with zinc thymulin in other countries
Frequently asked questions
Is GHK-Cu with zinc thymulin legal in the United States?
GHK-Cu with zinc thymulin can be sold in the United States as a supplement or cosmetic ingredient. Its legal category is "Permitted in cosmetics". That is not approval as a drug. FDA has not checked any health claim made for it. Versions you inject, and "research use only" versions, fall outside supplement rules, so that label does not make them legal to use in people. On the evidence, 1 completed human trial is cited on its profile. Note: Sold as a cosmetic serum, or as a pharmacy-mixed product for the skin. Not an approved treatment for hair loss. Claiming it regrows hair would make it a drug claim.
Can I buy GHK-Cu with zinc thymulin in the United States?
Yes, as a supplement or cosmetic. In the United States, GHK-Cu with zinc thymulin has the legal category "Permitted in cosmetics". So products you swallow, put on your skin or use as a cosmetic can be sold under supplement rules. Versions you inject, and products labeled "research use only", are not supplements. They are not approved for use in people. Note: Sold as a cosmetic serum, or as a pharmacy-mixed product for the skin. Not an approved treatment for hair loss. Claiming it regrows hair would make it a drug claim.
Is GHK-Cu with zinc thymulin FDA approved?
No. FDA status: Sold as a cosmetic, or as a skin product mixed by a pharmacy. Neither part is an approved drug for hair loss. The approved drug you put on the scalp for pattern hair loss is minoxidil.. Current US legal category: "Permitted in cosmetics". On the evidence, 1 completed human trial is cited on its profile.
Related compounds in the United States
Full research profile
How GHK-Cu with zinc thymulin works, the studies we cite, FDA status and the full legal summary are all on its compound profile.
GHK-Cu with zinc thymulin profileThis page is general information about the legal status of GHK-Cu with zinc thymulin in the United States, current as of Sep 2026. It is not legal advice. Legal status changes. For your own situation, check with U.S. Food and Drug Administration or ask a lawyer. Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use. Sellers named on the price pages are ranked by certificate tier, then price, and any affiliate income is disclosed there. Naming a seller is not a recommendation to buy or use anything.