Legal status · Canada
Is TUDCA legal in Canada?
Written by Aaron CuhaReviewed Sep 2026
Direct answer
TUDCA can be sold in Canada as a supplement or cosmetic ingredient, classified as "Sold as a supplement". That is not drug approval: Health Canada has not evaluated any health claim, and injectable or "research use only" versions fall outside supplement rules, so that label does not make human use lawful. On the evidence, 5 human studies are cited on its profile.
TUDCA in Canada at a glance
| Classification | Sold as a supplement |
|---|---|
| Note | Sold as a natural health product. The ALS combination product's marketing authorisation was voluntarily withdrawn with Health Canada. |
| Health Canada approval status | Not a Health Canada drug approval; sold as a supplement or cosmetic |
| Human studies cited | 5 of 6 citations on the profile |
| Reviewed | Sep 2026 |
Classification and note come from the TUDCA profile, checked against Health Canada, Health Products and Food Branch (Health Canada) listings at the reviewed date.
What this means
- 01
TUDCA can be sold in Canada as a supplement, food or cosmetic ingredient under the classification above, without drug approval.
- 02
Supplement status means Health Canada has not evaluated any health claim; manufacturers are responsible for safety and labeling, and quality varies by product.
- 03
Injectable or "research use only" versions are not supplements. That label does not make human use lawful, and injectables fall under medicines rules.
What TUDCA is
Twenty obese adults, four weeks: hepatic and muscle insulin sensitivity rose about 30 percent on a clamp, while adipose tissue insulin sensitivity and the endoplasmic reticulum stress markers the drug was meant to fix did not change. In ALS the phase 3 trial of TUDCA combined with sodium phenylbutyrate missed its endpoint and the approved product was voluntarily withdrawn from the market.
TUDCA is the taurine conjugate of ursodeoxycholic acid, which has its own entry on this site. The two are not interchangeable, and supplement marketing routinely treats them as though they were.
Mechanism: A hydrophilic bile acid that acts as a chemical chaperone, stabilising protein folding and reducing endoplasmic reticulum stress, and separately raising the threshold for mitochondrial permeability transition so that less cytochrome c is released and less apoptosis occurs. Conjugation with taurine increases water solubility and changes how the molecule is handled in the enterohepatic circulation relative to unconjugated ursodeoxycholic acid, which is why the two are studied separately.
Regulatory history: Not approved as a single agent. A fixed combination of sodium phenylbutyrate and taurursodiol was FDA-approved for ALS and then voluntarily withdrawn by its sponsor after the phase 3 PHOENIX trial showed no change on the primary functional endpoint. TUDCA on its own is sold as a dietary supplement.
How Health Canada treats this kind of product
Authorises drugs for sale through a Notice of Compliance and Drug Identification Number. A compound that is not authorised for sale cannot lawfully be sold for human use, and personal importation of prescription drugs is limited.
The classification above is the The Longevity Archive reading of Health Canada, Health Products and Food Branch listings for TUDCA at the reviewed date, not a legal opinion. Rules change, and importing, prescribing and possessing a compound can each be treated differently. Check the regulator directly before acting on anything here.
TUDCA in other countries
Frequently asked questions
Is TUDCA legal in Canada?
TUDCA can be sold in Canada as a supplement or cosmetic ingredient, classified as "Sold as a supplement". That is not drug approval: Health Canada has not evaluated any health claim, and injectable or "research use only" versions fall outside supplement rules, so that label does not make human use lawful. On the evidence, 5 human studies are cited on its profile. Note: Sold as a natural health product. The ALS combination product's marketing authorisation was voluntarily withdrawn with Health Canada.
Can I buy TUDCA in Canada?
Yes, in supplement or cosmetic form. In Canada TUDCA is classified as "Sold as a supplement", so oral, topical or cosmetic products can be sold under supplement rules. Injectable versions and products labeled "research use only" are not supplements and are not approved for human use. Note: Sold as a natural health product. The ALS combination product's marketing authorisation was voluntarily withdrawn with Health Canada.
Is TUDCA Health Canada approved?
No. In Canada TUDCA is classified as "Sold as a supplement", which is not a Health Canada marketing approval. For comparison, the US FDA status is: Not approved as a single agent. A fixed combination of sodium phenylbutyrate and taurursodiol was FDA-approved for ALS and then voluntarily withdrawn by its sponsor after the phase 3 PHOENIX trial showed no change on the primary functional endpoint. TUDCA on its own is sold as a dietary supplement.. On the evidence, 5 human studies are cited on its profile.
Related compounds in Canada
Full research profile
Mechanism, cited studies, FDA status and the full legal summary for TUDCA live on its compound profile.
TUDCA profileThis page is general information about the regulatory status of TUDCA in Canada, current as of Sep 2026. It is not legal advice, and classifications change; check Health Canada, Health Products and Food Branch directly or consult 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 and does not recommend where to buy anything.