Best TUDCA Supplements 2026: 8 Products Compared and Ranked

Last updated: August 20, 2026 · Originally published August 3, 2026 · Published by Eternal Elixir

Last updated: August 20, 2026 · By Eternal Elixir Editorial · 8 products compared

Shopping for the best TUDCA supplements in the US comes down to one number almost nobody puts on the page: what you actually pay for 500 mg of tauroursodeoxycholic acid, and how many capsules you have to swallow to get there. Label doses are quoted per capsule by some brands and per two-capsule serving by others, and at least one popular product blends TUDCA with milk thistle — so the sticker prices on the shelf are not comparable to each other in any useful way.

TUDCA is tauroursodeoxycholic acid, a taurine-conjugated bile acid sold as a capsule or powder supplement. Most US products supply 250–500 mg per serving. Prices in this comparison range from roughly $0.67 to $1.03 per 500 mg of TUDCA.

This guide normalizes all eight products to the same unit — US dollars per 500 mg of TUDCA — and adds a column no other roundup publishes: how many capsules that 500 mg costs you. Prices were read from live US listings on August 3, 2026. Eternal Elixir sells a TUDCA product and it appears in this list, ranked where the criteria actually put it, not at the top by default.

Best TUDCA supplements compared: cost per 500 mg, capsule burden and US shipping

Every row below is normalized to the same unit — US dollars per 500 mg of tauroursodeoxycholic acid — because per-bottle and per-capsule prices are not comparable when label doses differ. Where a live price could not be confirmed on the day of writing, the cell reads “not confirmed” rather than an estimate.

Prices read from live US listings on August 3, 2026 and subject to change. “Price per 500 mg” divides the bottle price by the number of 500 mg doses the bottle contains, so capsule products with a 250 mg label dose are counted at two capsules per dose.

Why TUDCA is one of the harder supplements to buy well

TUDCA is the taurine conjugate of ursodeoxycholic acid, a bile acid the human body already makes in small quantities. Supplement-grade TUDCA is synthesized rather than extracted from animal bile, and it is expensive to produce — which is precisely why buyers on supplement forums repeatedly warn each other about adulterated product. A long-running thread on r/Supplements that ranks on page one for this search describes TUDCA as a commonly faked supplement and advises sticking to brands with published testing. That advice is worth taking seriously, and it is the reason lab-testing disclosure carries real weight in the scoring below rather than being a checkbox. It is the same authenticity problem that dogs the resin market covered in our review of shilajit benefits for men, and the same defense applies: buy from a brand that publishes a certificate of analysis.

The second problem is unit confusion. A 250 mg capsule at $19.99 for 60 looks cheaper than a 500 mg capsule at $59.99 for 60, and it is — but not by as much as the shelf suggests, because the first bottle contains 30 doses of 500 mg and the second contains 60. Blended products make this worse: a label reading “1,250 mg per serving” may be 1,000 mg TUDCA plus 250 mg milk thistle. Normalizing to cost per 500 mg of actual TUDCA is the only way to compare these honestly, and it changes the ordering.

Research on TUDCA in humans is real but narrower than marketing copy implies. A randomized, double-blind trial in Medicine (Baltimore) assigned 199 patients with primary biliary cholangitis to 250 mg TUDCA or 250 mg ursodeoxycholic acid three times daily for 24 weeks; 75.97% of the TUDCA group and 80.88% of the UDCA group achieved a serum alkaline phosphatase reduction of more than 25% from baseline, a difference that was not statistically significant (P = 0.453). That is a clinical population under supervision, not a wellness study, and it should not be read as evidence about healthy adults. Separately, a randomized placebo-controlled trial in Diabetes gave 1,750 mg TUDCA per day to adults with obesity for four weeks and reported roughly a 30% increase in hepatic and skeletal-muscle insulin sensitivity versus no change on placebo, in 20 participants. Both are small. Neither tests any finished retail product.

1. Double Wood TUDCA — Best Overall

Double Wood TUDCA ranks first here on the strength of three things that are all independently checkable: it is the top-ranking organic result for this search, it carries a 4.7-out-of-5 rating across roughly 120 verified reviews, and the brand publishes third-party lab results for the product rather than simply asserting that testing happened. Google’s own AI Overview for this query names it as the purity and transparency pick, citing the same lab-result disclosure.

Key specs: 250 mg of tauroursodeoxycholic acid per capsule, 500 mg per two-capsule serving, 60 capsules per bottle. Listed at $27.95 for the 60-count bottle, with larger multi-packs quoted up to $75.47. That works out to roughly $0.93 per 500 mg — mid-pack on cost, not the cheapest.

Pros:

• Publicly posted third-party lab results, which matters more than usual for a compound with a known adulteration problem
• Largest verified review base of any product compared here
• Clean single-ingredient label with no proprietary blend
• Widely stocked, including at big-box marketplaces, so it is easy to source domestically

Cons:

• Two capsules for a 500 mg dose
• Stock has been intermittent — the direct product page has shown backorder status
• Not the lowest cost per 500 mg on this list

Best for: buyers who want the safest default choice and are willing to pay a small premium over the budget options for a documented testing trail.

Where to buy: direct from the brand or through major US marketplaces.

2. BulkSupplements TUDCA Capsules

BulkSupplements TUDCA Capsules is the value winner among capsule products once you normalize the unit. A 60-capsule bottle delivering 500 mg per two-capsule serving — 30 servings — has been listed at $22.97, which is roughly $0.77 per 500 mg. BulkSupplements also sells the same compound as loose powder in 25 g and 100 g sizes, and a 90-capsule version is listed separately.

Key specs: 500 mg TUDCA per two-capsule serving; 60-capsule (30-serving) and 90-capsule bottles available; also sold as powder.

Pros:

• Lowest confirmed cost per 500 mg among capsule products in this comparison
• Same brand offers powder, so you can move to bulk pricing without switching suppliers
• Minimal-excipient, single-ingredient approach
• Cited in Google’s AI Overview for this query as the budget pick

Cons:

• Two capsules per 500 mg dose
• Bottle-count naming across the 60 and 90 capsule listings is easy to misread — check servings, not capsules
• Packaging and brand presentation are utilitarian, which some buyers read as lower quality even though the label is clear

Best for: cost-sensitive buyers taking TUDCA daily over months, where a $0.20 difference per dose compounds into real money.

3. Eternal Elixir TUDCA 500mg — Best Single-Capsule 500 mg Dose

Eternal Elixir TUDCA 500mg is the only product in this comparison that puts a full 500 mg of tauroursodeoxycholic acid into one capsule. Every other capsule product here — Double Wood, BulkSupplements, Nutricost, Best Naturals, Vinatura — requires two capsules to reach the same amount. If capsule burden matters to you, either because you already take several supplements daily or because you dislike swallowing capsules, that is a genuine and verifiable difference rather than a marketing line.

It does not win on price, and this guide is not going to pretend otherwise. At $59.99 for 60 capsules with a one-capsule serving, the cost is $1.00 per 500 mg — above Best Naturals, BulkSupplements and Double Wood, and roughly level with Nutricost. What you are paying the premium for is the single-capsule format, direct-from-brand supply, and the shipping and returns terms below.

Key specs: 500 mg tauroursodeoxycholic acid per capsule, one capsule per label serving, 60 capsules per bottle, 60 label servings. Other label ingredients are rice flour and a cellulose capsule shell — no proprietary blend. $59.99 for one bottle, with multi-bottle pricing discounted 10–20%.

Pros:

• 500 mg in a single capsule — unique among the products compared here
• Full inactive-ingredient disclosure on the product page
• Third-party lab tested and GMP certified manufacturing, US-based operation
• Ships within 24 hours domestically; free US shipping on orders over $100
• 30-day money-back guarantee, which none of the marketplace listings here match
• Product page links the primary clinical literature directly rather than paraphrasing it

Cons:

• Highest sticker price per bottle in this comparison at $59.99
• Mid-to-high on cost per 500 mg at $1.00 — about 30% more than BulkSupplements
• Smaller public review base than Double Wood
• Sold direct only, not through big-box retail, so no same-day pickup

Best for: buyers who want a 500 mg dose without doubling their daily capsule count, and who value a returns policy and direct brand accountability over the lowest possible unit cost. Eternal Elixir also carries Reduced L-Glutathione and Berberine HCl, which is useful if you are building a broader liver and metabolic routine from one supplier rather than four.

Where to buy: eternalelixir.com/product/tudca — $59.99, 60 capsules.

4. Nutricost TUDCA — Best Wide Retail Availability

Nutricost TUDCA is the most broadly distributed product in this comparison. The 250 mg, 60-capsule bottle is listed at Target, Vitacost, Macy’s, Amazon, eBay and the brand’s own store, with a representative marketplace price around $30.99. Normalized, that is about $1.03 per 500 mg — the highest confirmed figure here, which is the honest trade-off for convenience and near-universal availability.

Key specs: 250 mg TUDCA per capsule, 60 capsules per bottle, gluten-free and non-GMO per the label. Multi-bottle packs (2 and 3 bottles) are sold as distinct listings.

Pros:

• Available at more US retailers than any other product on this list
• Multi-bottle bundles reduce the effective unit cost
• Established brand with a long catalog and consistent labeling conventions
• Easy to return through mainstream retail channels

Cons:

• Highest confirmed cost per 500 mg in this comparison
• Two capsules per 500 mg dose
• Price varies noticeably between retailers, so the listing you land on matters

Best for: buyers who want to pick a bottle up locally or add it to an existing order at a retailer they already use.

5. Best Naturals TUDCA — Lowest Cost per 500 mg

Best Naturals TUDCA carries the lowest shelf price in this comparison: $19.99 for 60 vegetarian capsules at 250 mg each, listed at Target and Walmart with a 4.7 rating from a small review count. Normalized, that is about $0.67 per 500 mg — the cheapest figure on this page.

It sits at number five rather than number one because cheapest is not the same as best. The verified review base is thin compared with Double Wood, and the public lab-testing disclosure is less developed than the brands ranked above it. On a compound with a documented adulteration problem, that gap is the reason for the ranking, not the price.

Key specs: 250 mg tauroursodeoxycholic acid per vegetarian capsule, 60 capsules per bottle, positioned by the brand as a one-to-two capsule daily product.

Pros:

• Lowest cost per 500 mg of any product compared here
• Vegetarian capsule shell
• Stocked at Target and Walmart, so same-day pickup is often possible
• Low commitment cost if you want to try TUDCA before buying a larger supply

Cons:

• Small verified review base
• Less third-party testing documentation published than the top-ranked options
• Two capsules per 500 mg dose

Best for: first-time buyers testing tolerance at the lowest possible outlay, who intend to move to a brand with fuller testing disclosure if they continue.

6. BulkSupplements TUDCA Powder — Best for Dose Flexibility

BulkSupplements TUDCA Powder is the same compound in loose form, sold in 25 g (50 servings) and 100 g (200 servings) sizes at 500 mg per quarter teaspoon. Powder is the format most often recommended in forum discussions about avoiding adulterated capsule product, on the reasoning that there is nothing between you and the raw material. Google’s AI Overview for this query lists it as the budget bulk option and notes, accurately, that the taste is unpleasant.

Key specs: 500 mg per 1/4 teaspoon; 25 g and 100 g containers. A current per-gram price could not be confirmed on the day of writing, so no cost-per-500 mg figure is quoted above.

Pros:

• Bulk sizes bring the per-dose cost well below any capsule product
• Dose is fully adjustable rather than locked to a capsule increment
• No capsule shell, binders or flow agents
• 200-serving container suits long-run daily use

Cons:

• Bitter and strongly flavored — a widely reported complaint
• Requires an accurate scale to dose reliably; volumetric scoops are approximate
• Not portable in the way a bottle of capsules is
• Live pricing was not confirmed at the time of writing

Best for: experienced supplement users who already own a milligram scale and want the lowest long-run cost.

7. Vinatura TUDCA + Milk Thistle — Best Combination Formula

Vinatura TUDCA Milk Thistle is the highest-dose product referenced in Google’s AI Overview for this query, at 1,000 mg of TUDCA per two-capsule serving plus 250 mg of milk thistle. The AI Overview describes it as the high-strength value and combination pick. It is also the clearest illustration of why blended labels need care: the headline milligram figure on a combination product is not all TUDCA, and comparing it against a single-ingredient label without splitting the actives out will mislead you.

Key specs: 1,000 mg TUDCA plus 250 mg milk thistle (silymarin) per two-capsule serving. Current US pricing was not confirmed at the time of writing, so it carries no cost figure in the table.

Pros:

• Highest per-serving TUDCA dose of the products referenced here
• Milk thistle is included at a meaningful stated amount rather than a token dusting
• Convenient if you were going to buy both compounds anyway

Cons:

• Combination format removes your ability to adjust either ingredient independently
• Blended labeling makes honest cost-per-milligram comparison harder
• Live US pricing was not confirmed, so it cannot be ranked on value
• Smaller US distribution footprint than Nutricost or Double Wood

Best for: buyers who specifically want TUDCA and milk thistle together in one capsule and are not optimizing for cost per milligram.

8. Amazon TUDCA Bile Salts 500mg — Best Marketplace Convenience

The listing titled TUDCA Bile Salts 500mg ranks on page one of this search and is representative of the large marketplace category: 500 mg per serving, marketed for digestion, gallbladder and liver support, and available with fast Prime delivery. It ranks last here for a defensible reason — marketplace listings of this type rotate sellers, packaging and formulation more often than brand-direct products, and neither a stable price nor a public certificate of analysis could be confirmed on the day of writing.

Key specs: 500 mg per serving as listed. Serving size in capsules, current price and testing documentation were not confirmed.

Pros:

• Fastest delivery of any option here for Prime members
• Straightforward returns through the marketplace
• 500 mg per serving on the label

Cons:

• No confirmed third-party testing documentation — the biggest single risk on a commonly adulterated compound
• Listing details and sellers change without notice
• Could not be normalized into the cost-per-500 mg table

Best for: buyers who prioritize delivery speed and will vet the seller themselves.

How we evaluated the best TUDCA supplements

Eternal Elixir sells a TUDCA product and it is included in this comparison, so it is worth being explicit about the method and its limits. We did not run laboratory analysis on competitor products and we did not conduct a clinical trial. What this guide does is read live US product listings, normalize the numbers to a single comparable unit, and check what testing documentation each brand actually publishes. Every figure above is traceable to a listing or a label. Where something could not be confirmed, the table says so instead of guessing.

The weighting:

• Quality and purity documentation (30%) — is third-party testing published, or merely asserted? Given how frequently TUDCA adulteration is reported by buyers, this carries the heaviest weight and is the single factor that decided the top two positions.
• US availability and shipping speed (20%) — domestic stock, retail footprint, and how fast the product actually arrives.
• Price per 500 mg in USD (20%) — normalized cost, not sticker price. This is where the ordering diverges most from other roundups.
• Product range for stacking (15%) — whether the brand carries adjacent products, so you are not managing five suppliers for one routine.
• Customer reviews and reputation (15%) — verified review volume and rating, weighted by how many reviews there are rather than the headline star figure alone.

Applied honestly, this puts Eternal Elixir third: strong on availability, stacking range and documentation, weak on normalized price.

How TUDCA fits alongside other longevity supplements

Most people buying TUDCA are not buying it in isolation — it usually turns up as one component of a broader routine, which is why the stacking criterion carries weight above. A few adjacent comparisons worth reading before you commit to a supplier:

• If NAD+ precursors are the other half of your routine, our comparison of the best NMN supplements applies the same normalized cost-per-dose method to eight US NMN products, and the NMN versus resveratrol breakdown covers whether the two are worth pairing.
• For the cellular-aging side, the evidence review on Ca-AKG benefits and what the studies actually show is the most useful counterweight to the marketing around that compound.
• If mitochondrial energy is your reason for looking at TUDCA in the first place, start with what the research shows on methylene blue, then work through the practical methylene blue dosage guide before buying anything.

The practical point: four compounds from four suppliers means four shipping charges, four returns policies and four testing standards to evaluate.

Frequently asked questions about the best TUDCA supplements

What not to mix with TUDCA?

TUDCA is a bile acid, and bile-acid sequestrants such as cholestyramine and colestipol bind bile acids in the gut, which can reduce absorption of anything in that class taken at the same time. Aluminum-containing antacids work similarly. Because TUDCA also has documented effects on insulin sensitivity in trial settings, anyone taking glucose-lowering medication should raise it with their prescriber before starting. If you take any prescription medicine, or you have a diagnosed liver, gallbladder or bile-duct condition, talk to a qualified healthcare professional before adding TUDCA rather than working it out from a supplement label.

What is better, TUDCA or milk thistle?

They are not interchangeable and the honest answer is that it depends on what you are after. TUDCA is a specific bile acid with a small body of human randomized trial data, most of it in clinical populations at doses of 250 mg three times daily or 1,750 mg per day. Milk thistle (silymarin) is a plant extract with a larger but generally lower-quality evidence base and a different proposed mechanism. Some products, such as the Vinatura formula in this comparison, combine both. If you want dose control over each, buy them separately; if you want convenience and are not optimizing per-milligram cost, a combination product is reasonable.

Is TUDCA safe to take every day?

In the randomized trials cited above, TUDCA was taken daily for 4 to 24 weeks and was described as well tolerated, with adverse event rates comparable to the comparator or placebo. Those were supervised studies in defined populations, not open-ended use by healthy adults, and long-term daily safety data outside those settings is limited. Follow the dose on the physical product label, and if you intend to take it continuously for months, do that under the guidance of a healthcare professional who knows your history.

When to take TUDCA, morning or night?

There is no trial evidence establishing that one time of day outperforms another. The trials that used divided dosing gave 250 mg three times daily, which implies spreading it across the day rather than concentrating it. Because TUDCA is a bile acid and bile release is triggered by eating, many labels suggest taking it with food. The practical answer is to pick the time you will actually remember and stay consistent, and follow the timing instruction on the label you bought.

How much does TUDCA cost in the US?

Across the eight best TUDCA supplements compared here, normalized cost ranges from roughly $0.67 to $1.03 per 500 mg of TUDCA. Bottle prices range from $19.99 to $59.99. Bulk powder is cheaper per dose than any capsule product but requires a scale to use properly. The wide spread comes largely from label doses differing between 250 mg and 500 mg, which is why per-bottle prices are misleading on their own.

What dose of TUDCA do studies use?

The two human randomized trials cited on this page used 250 mg three times daily for 24 weeks in patients with primary biliary cholangitis, and 1,750 mg per day for four weeks in adults with obesity. Both are clinical research doses in defined populations under supervision. Retail supplement labels typically suggest considerably less — commonly 250 mg to 500 mg per serving. Follow the physical product label rather than extrapolating a research dose.

Where can I buy TUDCA in the US?

The best TUDCA supplements are widely available domestically. Nutricost is stocked at Target, Vitacost, Macy’s, Amazon and eBay; Best Naturals is at Target and Walmart; Double Wood and BulkSupplements sell direct and through marketplaces; and Eternal Elixir sells direct at eternalelixir.com with 24-hour dispatch and free shipping on orders over $100. Buying direct from a brand generally gives you a clearer returns path and a more current certificate of analysis than a rotating marketplace listing.

Is cheaper TUDCA lower quality?

Not necessarily, but price is a weak signal and testing documentation is a strong one. TUDCA is expensive to synthesize, which is why buyers on supplement forums report adulterated product often enough that it is a standing warning in the category. Rather than using price as a proxy, check whether the brand publishes a third-party certificate of analysis for the batch you are buying — that is the single line that separates the best TUDCA supplements from the rest. Two of the products in this comparison do so publicly; several do not.

What does taking TUDCA do?

TUDCA (tauroursodeoxycholic acid) is a water-soluble bile acid the body already makes in small amounts from ursodeoxycholic acid and the amino acid taurine. Its studied roles sit around bile flow and cellular stress handling rather than any single felt effect. The clearest human signal comes from a randomized, placebo-controlled trial published in Diabetes, where 1,750 mg per day for four weeks improved liver and muscle insulin sensitivity in 20 adults with obesity, with no change measured in fat tissue and no change after placebo (Kars et al., 2010, PMID 20522594). That was a supervised research dose, roughly three times a typical 500 mg supplement serving, so treat it as evidence that the compound is biologically active rather than as a promise about what one capsule a day will do.

Who should not take TUDCA?

Anyone who is pregnant or breastfeeding should skip it, since there is no supporting safety data in that group. The same applies if you are taking prescription medicine — particularly bile-acid, cholesterol or blood-sugar medicines — or if you have a diagnosed liver or gallbladder condition, because the published trials were run in supervised clinical populations rather than in general consumers. Bile-acid supplements can also interact with how other compounds are absorbed. Speak with a qualified healthcare professional before starting, and treat that conversation as more useful than any comparison table on this page.

Can TUDCA damage the liver?

Research indicates the opposite direction of effect in the populations studied, but the honest answer is that consumer-dose safety data is thinner than the marketing suggests. In a multicenter, randomized, double-blind trial published in Medicine (Baltimore), 199 patients with primary biliary cholangitis took TUDCA at 250 mg three times daily and the reported safety profile was comparable to the ursodeoxycholic acid comparator (Ma et al., 2016, PMID 27893675). That was a diagnosed patient group under medical supervision, which is not the same as long-term use by a healthy adult buying a bottle online. If you have any existing liver concern, that is a reason to involve a clinician, not a reason to self-manage with a supplement.

Does TUDCA reverse liver damage?

No supplement should be described that way, and this page will not. The human research on TUDCA sits in specific clinical populations under medical supervision, and it measures markers such as insulin sensitivity and biochemical response — not reversal of organ damage. For a general consumer, TUDCA is reasonably framed as structure-and-function support around bile flow and cellular stress handling. Anything stronger than that outruns the evidence, and a brand willing to make the stronger claim is telling you something useful about how it treats the rest of its label.

Verdict: which of the best TUDCA supplements should you buy?

The short version, by buyer type. If you are building a wider longevity routine around it, the evidence review of Ca-AKG and cellular aging applies the same evidence-grading standard used on this page.

• If you want the safest default: Double Wood TUDCA. Published third-party lab results, the largest verified review base here, mid-range cost at ~$0.93 per 500 mg.
• If cost per dose is the deciding factor: Best Naturals TUDCA at ~$0.67 per 500 mg is the lowest normalized cost on this page, with BulkSupplements powder cheaper still if you own a scale.
• If you do not want to swallow two capsules per dose: Eternal Elixir TUDCA 500mg is the only product compared here with a full 500 mg in one capsule, at $1.00 per 500 mg with 24-hour US dispatch and a 30-day money-back guarantee.
• If you want to buy it locally today: Nutricost or Best Naturals, both stocked at major US retailers.
• If you want TUDCA and milk thistle together: the Vinatura combination formula, with the caveat that blended labels make cost comparison harder.
• If you are building a wider liver and longevity routine: buying from one supplier that also carries glutathione and berberine removes several shipping charges and gives you one returns policy to deal with rather than four.

Whatever you pick, apply the same two checks: normalize the price to cost per 500 mg before comparing, and confirm the brand publishes third-party testing for the batch. Those two habits matter more in this category than the specific brand on the bottle.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.