Legal status by country
Is Thymosin alpha-1 with KPV and LL-37 legal?
Written by Aaron CuhaReviewed Sep 2026
How Thymosin alpha-1 with KPV and LL-37 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 | Not approved; research use only | Not licensed | Not approved | Not approved |
| Note | Thymosin alpha-1 was placed on FDA's list of substances presenting significant safety risks for compounding; LL-37 and KPV are not approved and are sold research use only. | None of the three is licensed; supply for human use is unlawful. | None recorded | None recorded |
US FDA status: Thymosin alpha-1 is approved in several countries outside the United States and is not FDA approved. LL-37 and KPV are not approved anywhere. The combination has never been evaluated.. 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.