Best TUDCA Supplements UK 2026: Eight Products Scored on the Evidence

Each product is scored 0 to 10 on every criterion. The weighted total out of 100 (the absolute score) sets the ranking. Weights were fixed before scoring and are the same for every product: 90% is on purity disclosure, dose, fillers, testing and labelling, and 10% on price per daily serving. Anything a page does not disclose scores 0 for that item and is shown as "not disclosed": we never assume a source, an ingredient or a test we cannot see. Each product also shows a relative score (top product = 100): its absolute score divided by the top product's absolute score, multiplied by 100 (see how relative scores work). Evidence was checked on 1 November 2026. Full method.

TUDCA (tauroursodeoxycholic acid) is a bile acid formed when ursodeoxycholic acid (UDCA) is joined to the amino acid taurine. The body makes small amounts. Supplement TUDCA can be made by chemical synthesis or produced from animal bile, which is why a stated source and purity matter when you compare products.

No nutrition or health claim is authorised for TUDCA in Great Britain. The research below is described so you know what has been studied. It is not a claim that any product in this guide has any effect, and none of these studies tested the products here.

TUDCA is not for children. Of the products here, Pureclinica is labelled for adults only, Charava and Double Wood say not for under-18s, and Vinco tells under-18s to consult a GP; the other pages give no age guidance. Keep to the directed dose, and stop and seek medical advice if you have side effects.

Products appear in order of their absolute score from the scoring table. We read each product page, and any testing documents and label images on it, on 1 November 2026. Amazon prices are the listed one-off price on that date. We have not bought or tested these products ourselves.

We compared 8 single-ingredient TUDCA capsule products available to UK buyers, using each product page, its label images and any testing documents linked from it, read on 1 November 2026. Each product was scored 0 to 10 on seven criteria. The weights and point rules were fixed before scoring and are identical for every product. If a page does not disclose something, that item scores 0 and we say "not disclosed": we never assume a source, an ingredient or a test we cannot see. Where a page states that a product contains no fillers and its ingredient list shows none, we take the list as stated.

• TUDCA purity and source disclosure (20%). Production route or source stated, such as synthetic or made from UDCA and taurine (4 points); a numeric purity figure stated (3); identity or TUDCA content shown on a readable certificate of analysis (3).
• Dose and label transparency (15%). TUDCA per daily serving stated (3); TUDCA per capsule stated (2); no conflicting dose figures (3); capsules and servings per pack stated (2, or 1 if only one is given).
• Fillers and additives (20%). Starts at 10. We deduct 2 points for each bulking agent or filler (such as rice flour, microcrystalline cellulose or dicalcium phosphate), anti-caking or flow agent (magnesium or vegetable stearate, silica or silicon dioxide), sweetener, preservative or colour; and 1 point for each emulsifier, flavouring, antioxidant, acidity regulator, or processing aid or oil. The capsule shell and the TUDCA itself are not deducted. Minimum 0.
• Testing and certificates (15%). A certificate of analysis for this product published and read by us (6); an accredited laboratory identified on it (2); certificates matched to batches on sale, such as a lot lookup or lot-specific certificates (2). Statements such as "third-party tested" score 0.
• Label and safety warnings (15%). Complete ingredient list using ingredient names (2, or 1 if partial); a pregnancy or breastfeeding warning (2); a medication caution (2); a gallbladder, bile duct or liver-condition caution (2); an age statement such as adults only or not for under-18s (1); a do-not-exceed statement (1). A statement playing down medication interactions loses 2 points.
• Capsule, vegan and allergen clarity (5%). Capsule material named (4); vegan or vegetarian status stated or clear (3); an allergen or gluten statement (3).
• Price per daily serving (10%). 10 × (lowest price per daily serving ÷ this product's price per daily serving). Price is based on each brand's 3-pack price divided by 3 to give a single-pack price, then per daily serving; where no 3-pack is sold we use the single-pack price. We use one-off prices, not subscriptions, excluding delivery, from the page a UK buyer would order from. One serving is the smallest directed daily amount, so the amount of TUDCA per day differs between products.

Relative scores (top product = 100). A product's relative score is its absolute score (weighted total out of 100) divided by the absolute score of the top product in this guide, multiplied by 100 and rounded to one decimal place. It shows how each product compares with the best one we assessed. It is not a percentage of our criteria met: the top product, Charava Tudca 500mg, scored 81.4/100 on our absolute criteria. The same calculation is applied to every product, so it does not change the order. Each product's absolute score is shown next to its relative score and in the scoring table.

We also looked at other products. We could not verify Nutricost TUDCA on a live UK page when we checked, and TUDCA combined with NAC or other ingredients (for example from Supplement Needs and Applied Nutrition) was left out so the comparison is like for like. We found no TUDCA product from Naturecan, Nutrition Geeks or Love Life Supplements. The ranking is an editorial judgement based on these scores. It is not a clinical comparison, an independent certification or a laboratory test, and we did not buy or test any product. Every product is scored the same way. Commission is explained in the note at the top of this page.