Legal status by country
Is (R/S)-1,3-Butanediol legal?
Written by Aaron CuhaReviewed Sep 2026
How (R/S)-1,3-Butanediol 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 | Sold as a dietary supplement | Sold as a supplement | Available as a supplement / complementary medicine | Sold as a supplement |
| Note | None recorded | None recorded | None recorded | None recorded |
US FDA status: Not a drug. Permitted in the US as a food additive solvent for flavourings; sold in ketone supplement products. Not approved for any indication. The ITP lifespan result is equivocal: a site-dependent 2 percent female gain by log-rank and a Gehan-only 9 percent male gain, at 10 percent of the diet.. 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.