Legal status by country
Is GHK-Cu with zinc thymulin legal?
Written by Aaron CuhaReviewed Sep 2026
How GHK-Cu with zinc thymulin is classified in the United States, United Kingdom, Australia and Canada, side by side. Each country has its own page with a direct answer, the regulator's approval status and what the classification means in practice.
All four countries, side by side
| Attribute | United States · FDA | United Kingdom · MHRA | Australia · TGA | Canada · Health Canada |
|---|---|---|---|---|
| Status | Not approved | Not approved | Not approved | Not approved |
| Classification | Permitted in cosmetics | Permitted in cosmetics | Permitted in cosmetics | Permitted in cosmetics |
| Note | Sold as a cosmetic serum or compounded topical. Not an approved treatment for hair loss; a hair regrowth claim would be a drug claim. | Cosmetic; no marketing authorisation for hair loss. | None recorded | None recorded |
US FDA status: Sold as a cosmetic or as a compounded topical preparation. Neither component is an approved drug for hair loss; the approved topical for androgenetic alopecia is minoxidil.. Reviewed Sep 2026.
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General information current as of Sep 2026, not legal advice. Classifications change; confirm with the regulator or a lawyer for a specific situation. Educational use only. This database summarizes published research. It is not medical advice and contains no dosing protocols or recommendations for personal use. The Longevity Archive has no vendor relationships.