Supplements · Digestive support

Bile Salts: Benefits, Gallbladder Support, Dosage & Side Effects

What bile salts are, how your body uses them to digest fat, what the research shows for life without a gallbladder, liver enzymes and blood sugar, how ox bile and TUDCA compare, and how much to take with meals.

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Evidence-based43 sources citedUpdated October 9, 2026
Published Oct 3, 2026Last updated Oct 12, 2026Editorial policyMedical review policyFact-checking policy
A glowing blue illustration of the human torso with the liver highlighted in orange and the stomach and intestines visible below it
Your liver makes bile salts from cholesterol, and your gallbladder stores them until a meal with fat arrives.
The Dr. Axe Score™
5.9/10
Overall Dr. Axe Score · Bile Salts

Bile salts score 5.9 for putting back a substance your body already makes and recycles, a good safety record in trials and documented help with fat absorption when bile runs short.

Scientific Evidence
4.4/10
Controlled trials of TUDCA, up to 203 people; ox bile's record is mostly case reports.
Bioavailability & Absorption
6.4/10
Absorbed and recycled efficiently; extra bile acids raised fat absorption in documented cases.
Clinical Effectiveness
6.4/10
Our judgment: practical support for digesting fat without a gallbladder or with gallbladder issues.
Safety & Tolerability
7.0/10
Side effects matched comparison groups in trials; diarrhea at higher doses; skip with a blocked bile duct.
Why this score?
Why Bile Salts scores 5.9 / 10

    A trial of ox bile capsules for everyday digestion after gallbladder removal would raise it. Weighting: Evidence 30% · Bioavailability & Absorption 25% · Clinical Effectiveness 25% · Safety & Tolerability 20% (4.4×0.30 + 6.4×0.25 + 6.4×0.25 + 7.0×0.20 = 5.92, shown as 5.9). How we score

    A transparent, weighted index built for supplements. See how it’s calculated →

    Interaction check: Moderate. Bile acid binders (cholestyramine and colestipol) and aluminum-based antacids bind bile acids and cut their absorption, so ask your prescriber or pharmacist how far apart to take them.1238 The prescription bile acid UDCA has changed how the body handles ciclosporin, a transplant drug, in reports, so your transplant team should check your levels if you start a bile supplement.38 Estrogens and birth-control pills raise cholesterol in bile and may work against a bile acid's effect on gallstones.12

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    Bile salts at a glance

    Bile salts are the fat-digesting compounds your liver makes from cholesterol and your gallbladder stores, and as supplements they come mainly as ox bile, from cattle, and TUDCA.12

    • No gallbladder: your liver keeps making bile, and in a controlled trial of 203 people after gallbladder removal, 500 mg of TUDCA a day eased indigestion faster in the first month34
    • Fat absorption: in one documented case of severe bile loss, ox bile cut the fat lost in stool from 134 to 9 grams a day5
    • Liver enzymes: in a randomized trial of 199 people with a bile-duct disease, TUDCA lowered the liver enzyme ALP about as well as the prescription bile acid UDCA2
    • How to take it: ox bile at 125 to 500 mg with fatty meals, the dose in my free Healing Leaky Gut protocol, where bile support sits in the Replace step6

    Every time you eat a meal with fat in it, your gallbladder squeezes bile into your small intestine, and the bile salts in it work like dish soap on a greasy pan, breaking the fat into tiny droplets your enzymes can digest and your body can absorb.17 Your liver makes them from cholesterol, and your body reabsorbs and reuses almost all of them, meal after meal.1

    That system was designed to run quietly in the background. When it changes, as it does after gallbladder removal, bile no longer arrives in one stored squeeze at mealtime, and that matters for fat and for the vitamins A, D, E and K that depend on bile to get into your body.37

    For anyone without a gallbladder or with gallbladder issues, I recommend bile support with fatty meals: ox bile at 125 to 500 mg, the dose in my Healing Leaky Gut Protocol, or TUDCA at around 500 mg.68 As I shared on my show, the organ that gets most stressed in my body is my gallbladder, and I've found that when my bile is flowing well, my body does really well, so I take TUDCA anytime I'm eating a meal with any amount of fat, probably more than 10 grams.9

    If your body isn't producing enough bile, you can't fully break down and digest and absorb fats, but also it puts more stress on the small intestine.Dr. Josh Axe, DC, DNM, CNSFrom How to Heal Chronic Infections Naturally | Dr. Chris Motley, The Dr. Josh Axe Show (2026), at 13:59

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    Did you know?

    • Turning cholesterol into bile acids is one of the main ways your body clears cholesterol.1

    • Bile acids also work as signals, acting on receptors called FXR and TGR5 in your liver, gut, muscles and brown fat.7

    • Medical case reports of ox bile correcting severe fat malabsorption in people missing part of their intestine go back to at least 1982.10

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    What are bile salts?

    Quick answer

    Bile salts are bile acids joined to the amino acid glycine or taurine, a step that helps them dissolve in the watery contents of your gut so they can carry fat. Your liver makes them from cholesterol, 200 to 600 mg of new bile acids a day, and in human bile the glycine forms outnumber the taurine forms about three to one.1

    Bile is the fluid your liver makes and your gallbladder holds, and bile salts are the part of it that handles fat.7 You'll see "bile acids" and "bile salts" used interchangeably on labels and in research. Once bile reaches your intestine, gut bacteria convert some of it into secondary bile acids, which your body also reabsorbs and reuses.7

    Ox bile, TUDCA and UDCA

    Three bile products come up when people search for bile salts. Ox bile is dried bile from cattle, so it's a bovine product, and it supplies a natural mix of bile salts, bile acids already joined to glycine or taurine.11 TUDCA (tauroursodeoxycholic acid) is a single bile acid, ursodeoxycholic acid joined to taurine, sold as a supplement.2 UDCA (ursodeoxycholic acid, or ursodiol) is a prescription bile acid in the U.S.12 Products sold as "purified bile salts" or "bile extract" should name the source animal and the milligrams per capsule; look for bovine (ox) bile.

    How do bile salts work?

    Bile salts let your body digest and absorb fat, and your body uses the same supply over and over through the day.1 Here's the loop, one step at a time.

    How bile salts handle a fatty meal

    1Made from cholesterol

    Your liver turns cholesterol into new bile acids and joins most of them to glycine or taurine, which makes them bile salts that dissolve well in the gut.1

    2Stored between meals

    Your gallbladder holds bile and concentrates it while you're not eating.7

    3Released when fat arrives

    After a meal, a hormone from your small intestine called cholecystokinin (CCK) tells your gallbladder to squeeze bile into your gut.1

    4Fat gets absorbed

    Bile salts help you digest and absorb fats, cholesterol and vitamins A, D, E and K.7

    5Recycled

    About 95% of bile acids are reabsorbed at the end of your small intestine and sent back to your liver, so a pool of about 3 grams makes the trip 4 to 12 times a day; the roughly 0.5 grams lost in stool each day is replaced.1

    6Without a gallbladder

    Bile keeps flowing, but with nowhere to store it, the pool of bile acids runs smaller and cycles faster.313

    That recycling loop is why your body needs so little new bile each day, and it's also why the end of your small intestine matters so much. When that section is removed or diseased, bile acids slip past it, fat absorption drops, and the case reports in the benefits below come from exactly those patients.514

    What are bile salts good for?

    Quick answer

    Bile salts help people digest fat when bile runs short, after gallbladder removal or when part of the intestine is missing. In trials, TUDCA eased indigestion faster in the first month after gallbladder surgery and lowered liver enzymes in chronic liver disease, and small trials point to better insulin sensitivity and after-meal blood sugar.41521617

    Where the research stands

    The closest trial to everyday use is a controlled trial of TUDCA in 203 people after gallbladder removal; we found no randomized trial yet of an over-the-counter ox bile or TUDCA capsule for fat digestion after surgery.4 Ox bile's human record is case reports in people with severe bile loss plus one 28-day placebo-controlled trial of a delayed-release form, so the product and dose are named in every result below.51117

    Bile salt benefits, graded by evidence (updated October 2026). Evidence labels are editorial judgments that compare these uses with each other; they aren't formal certainty ratings.
    UseEvidenceProduct studiedWhat the research shows

    Liver enzyme levels

    Moderate

    TUDCA, 500 to 750 mg a day, for 24 weeks or 6 months

    Liver enzymes fell in chronic hepatitis and cirrhosis; matched prescription UDCA on ALP in a bile-duct disease21518

    Digestion after gallbladder removal

    Emerging

    TUDCA, 500 mg a day, vs. no treatment

    Indigestion eased faster at one month; the groups were the same at two and three months4

    Fat absorption when bile runs short

    Emerging

    Ox bile extract; natural bile acids from ox bile, 2 g per meal

    Fat lost in stool fell from 134 to 9 g a day in one case; fat absorption rose about 40 g a day in another511

    Blood sugar and insulin sensitivity

    Emerging

    TUDCA, 1,750 mg a day, 4 weeks; delayed-release ox bile acids, 500 mg twice a day, 28 days

    Insulin sensitivity up about 30% in liver and muscle; one after-meal blood sugar measure down 9%1617

    Small-intestine bacteria

    Preclinical

    A lab compound that switches on the bile acid receptor FXR, given before and after bile flow was blocked

    Bacterial overgrowth and injury in the small intestine were held back when FXR was switched on19

    Bile salt benefits, ranked by evidence

    Ranked by the strength of the human research behind each use, bile salts' benefits start with liver enzyme levels and digestion after gallbladder removal, followed by fat absorption when bile runs short, blood sugar and insulin sensitivity, and early research on small-intestine bacteria.

    1

    Healthier liver enzyme levels

    Moderate evidenceHuman study3 randomized trials · 372 adults with liver disease · TUDCA

    In a randomized trial of 199 people with primary biliary cholangitis, a disease of the small bile ducts in the liver, neither the people nor the researchers knew who got what. TUDCA (250 mg three times a day) did about as well as the prescription bile acid UDCA over 24 weeks: 75.97% versus 80.88% reached a drop of more than 25% in ALP, a liver enzyme used to track bile-duct disease, a difference that wasn't significant. Itching rose on UDCA, from 1.43% to 10.00% of patients, and didn't change on TUDCA.2 In a placebo-controlled trial of 150 adults with hepatitis C–related chronic hepatitis, 500 or 750 mg of TUDCA a day for six months lowered liver enzymes compared with placebo, though the trial didn't track clinical outcomes.15 In a third randomized trial, in which neither the people nor the researchers knew who got what, 23 adults with cirrhosis (18 analyzed) took 750 mg of TUDCA or UDCA a day for six months; ALT, AST and ALP fell from their starting levels on TUDCA, against AST alone on UDCA, though neither treatment changed markers of liver scarring.18

    Study takeaway: TUDCA lowered liver enzymes in three randomized trials in liver disease, about as well as the prescription bile acid in one.

    2

    Digestion after gallbladder removal

    Emerging evidenceHuman studyControlled trial · 203 adults after gallbladder removal · TUDCA

    In an Italian trial of 203 people with indigestion after gallbladder removal, 101 took 500 mg of TUDCA a day and 102 took nothing, an untreated comparison group. Symptoms eased faster on TUDCA, a significant difference at the one-month check; at two and three months the groups were the same, and side effects were few (2 people versus 3).4 The gallbladder section below covers what changes after surgery and how to use bile support.

    Study takeaway: TUDCA eased indigestion faster in the first month after gallbladder removal.

    3

    Fat absorption when bile runs short

    Emerging evidenceHuman studyCase reports · people missing part of the intestine · ox bile

    When the end of the small intestine is removed, bile acids aren't recycled and fat passes through unabsorbed. In one documented case, a patient who'd had the end of the small intestine and part of the colon removed for Crohn's disease took ox bile extract, and the fat lost in stool fell from 134 to 9 grams a day, while stool weight didn't rise (669 grams a day before, 507 after).5 In a second case report, a woman with severe fat loss and malnutrition after colon and small-intestine surgery had both corrected by ox bile, without more diarrhea.10 In a third, a woman with short bowel syndrome who couldn't be fed by vein took a natural bile acid mixture from ox bile, and her fat absorption rose by about 40 grams a day; on 2 grams with each meal, a dose far above a typical capsule, her weight rose from 80 to 98 pounds over four months, without side effects.11

    Study takeaway: In documented cases of severe bile loss, ox bile cut the fat lost in stool sharply.

    Ox bile: fat lost in stool fell from 134 g to 9 g a day

    Ox bile: fat lost in stool fell from 134 g to 9 g a dayOne adult after removal of the end of the small intestine and part of the colon for Crohn's disease · case report. Before ox bile: 134 g of fat in stool a day; On ox bile extract: 9 g of fat in stool a dayOne adult after removal of the end of the small intestineand part of the colon for Crohn's disease · case report
    134 g of fat in stool a day
    BEFORE OX BILE
    9 g of fat in stool a day
    ON OX BILE EXTRACT
    -125 g of fat in stool a day · -93.3%
    Source: Little et al. · Digestive Diseases and Sciences, 1992 [5]Fat lost in stool per day before and during ox bile treatment in one patient. A lower bar means more fat absorbed.
    4

    Blood sugar and insulin sensitivity

    Emerging evidenceHuman study2 randomized trials · 43 adults · TUDCA and a delayed-release ox bile product

    In a placebo-controlled trial of 20 adults with obesity and insulin resistance, 1,750 mg of TUDCA a day for four weeks raised insulin sensitivity in the liver and muscle by about 30%, with no change on placebo. The people didn't know which they got, the maker donated the capsules, and insulin sensitivity in fat tissue, body weight and liver fat didn't change.16 In a 28-day placebo-controlled trial of 23 adults with obesity and type 2 diabetes, in which neither the people nor the researchers knew who got what and all 23 finished, delayed-release capsules of ox bile acids (500 mg twice a day), built to open in the lower intestine, lowered after-meal blood sugar by 9% on one of two measures compared with placebo, along with fructosamine, another blood sugar marker, fasting insulin and LDL cholesterol, and raised the fullness hormone GLP-1.1720 Fasting blood sugar, weight and the paper's main after-meal measure didn't differ, and the maker supplied the capsules and research support.17

    Study takeaway: TUDCA raised insulin sensitivity in the liver and muscle by about 30% in four weeks.

    5

    Small-intestine bacteria balance

    PreclinicalAnimal studyMouse study

    In mice, blocking bile flow led to bacterial overgrowth and injury in the small intestine, and switching on FXR, a bile acid receptor in the gut, with a lab compound held that damage back; mice without FXR had more bacteria in the lower small intestine and a weaker gut barrier.19 Earlier rodent studies that paper cites found that bile acids taken by mouth held back the same overgrowth.19 That matches what I teach, that bile is partly responsible for keeping your microbes in check, and my SIBO Protocol explains that when bacteria break down bile acids, fats and fat-soluble vitamins aren't absorbed well.921 Our guide to small intestinal bacterial overgrowth (SIBO) covers the condition itself.

    Study takeaway: Switching on FXR, a bile acid receptor in the gut, held back bacterial overgrowth in the small intestine after bile flow was blocked.

    Do you need bile salts without a gallbladder?

    Quick answer

    Bile support can help: after gallbladder removal your liver keeps making bile, but with nowhere to store it, the pool of bile acids runs smaller and cycles faster, and in a controlled trial, TUDCA eased indigestion faster in the first month after surgery.3134 I recommend bile support with fatty meals for anyone without a gallbladder or with gallbladder issues; the doses are in the dosage section below.6

    What changes after your gallbladder is removed

    Think of your gallbladder as a holding tank for bile. Without it, your liver keeps making bile at its normal pace, but there's no stored supply to release in one squeeze when a fatty meal arrives.137 In 10 people studied after gallbladder removal, the pool of cholic acid, one of the two main bile acids, was significantly smaller than in people with a gallbladder, and bile acids turned over and broke down faster. The researchers concluded that after surgery, the small intestine alone acts as the pump that moves bile around the loop.3 In 28 people followed for up to four months after surgery, the pools of the two main bile acids averaged about 0.4 grams each, while the liver's production stayed normal, about 460 mg a day; the small pool was simply recycled more often.13

    Most people feel better after the operation, though symptoms don't always settle. In a survey of 573 people at least six months after laparoscopic gallbladder removal, non-pain symptoms fell from 80% before surgery to 43% after, and every one of them improved significantly except diarrhea; people who had fatty food intolerance before surgery were more likely to keep their symptoms.22 A review of 130 studies notes that surgery doesn't relieve abdominal symptoms in up to 40% of people and lists the body's changes after the operation as one of the main causes of new ones.23

    Who bile support suits

    Bile support fits two groups: people who've had their gallbladder removed, and people who still have a gallbladder but find that fat sits heavily or their stools turn greasy after fatty meals. The same goes for a high-fat diet such as keto: if fat digestion becomes a problem, bile support with meals can help. If you have gallbladder attacks, the red flags that need prompt care are in the safety section.

    As I've said on my show, "If you're dealing with gallbladder issues, especially if you've had your gallbladder removed or had gallstones or gallbladder stress, TUDCA is one of those absolutely must-have supplements." I suggest around 500 mg with meals that have any type of fat in them.8 If you've had your gallbladder removed, I also suggest ox bile or lipase enzymes, which digest fat.8 Choose a lipase made from plants or microbes.

    In my Healing Leaky Gut Protocol, bile support sits in the Replace step. Replace adds digestive enzymes with each meal, a bitter herb tincture before meals and ox bile for people without a gallbladder.624

    Signs your fat digestion needs support

    Fat your body doesn't absorb leaves in your stool, a pattern called steatorrhea, and it can show up as greasy stools after fatty meals.5 Fatty food intolerance, feeling unwell after rich meals, is another sign, and in the survey above it predicted symptoms that lasted after surgery.22

    A third sign is low levels of vitamin A, D, E or K despite a good diet or supplements. As I've explained on my show, the amount of fat-soluble vitamins like vitamin D that you absorb is oftentimes determined by bile flow.25 Routine bloodwork can show where your vitamin D and liver enzymes stand.

    Bloodwork that tracks vitamin D and your liver

    Together, these markers show how your liver and fat-soluble vitamins are doing, though none measures bile salts directly. Your practitioner can read them against your targets.

    • Vitamin D (25-hydroxy): A fat-soluble vitamin your body needs bile to absorb.7
    • ALP: A liver enzyme that trials of bile acids in bile-duct disease use to track response.2
    • ALT and AST: Liver enzymes that fell on TUDCA in trials in chronic hepatitis and cirrhosis.1518

    See the cellular bloodwork panel

    Have results? Analyze them free →

    How to support bile flow with food

    Food comes first, and for bile I recommend sour foods, bitter foods and steamed cruciferous vegetables. As I explained in my liver episode, some of the best things for your liver, gallbladder and bile are sour foods, especially a little lemon juice in your water or apple cider vinegar, and cruciferous vegetables, especially steamed.8

    I value bitter foods because, as I've explained on my show, when your body tastes bitter, it starts to release more bile, acid and enzymes.25 Choline is another piece: as I explained on my liver episode, choline or phosphatidylcholine supports bile production and fat transport.8 Egg yolks come first for phosphatidylcholine, and sunflower lecithin is a soy-free supplement way to add more.

    How you eat matters too. As I teach in my gut-healing episode, when you get out of fight-or-flight and lower cortisol, your body can typically produce more enzymes, stomach acid and bile, so sit down, take your time and relax at meals.24 Our guide to mindful eating has more ways to slow down.

    Squeeze lemon into a glass of water with your meal.8
    Whisk apple cider vinegar into a salad dressing.8
    Steam your crucifers, such as broccoli, cabbage and Brussels sprouts.8
    Start with bitter greens such as arugula or dandelion greens.25
    Sip dandelion root tea, one to two cups a day, the amount Dr. Will Cole and I list in Heal Your Cells.26
    Steam an artichoke and pull the leaves through your teeth.

    I also recommend beets, rich in betaine, and green apples, rich in malic acid, foods traditionally used to keep bile thin and flowing.26

    Turmeric has a human measurement behind its effect on the gallbladder. Traditionally, extracts containing curcumin, turmeric's main compound, were believed to make the gallbladder contract, and a modern ultrasound study measured exactly that.27 In a trial of 12 healthy volunteers who each tried both a single 20 mg dose of curcumin and a placebo, with neither the volunteers nor the researchers knowing which was which, gallbladder volume shrank by 29.3% two hours after curcumin, a significant difference from placebo.27 In a follow-up study in which 12 healthy volunteers each tried all three doses without knowing which they got, the gallbladder shrank by 34.10% two hours after 20 mg, 51.15% after 40 mg and 72.25% after 80 mg.28 A contracting gallbladder sends bile into your gut, so if you have gallstones, stick to turmeric in food and skip concentrated curcumin.

    Curcumin and the gallbladder: more curcumin, more contraction

    Curcumin and the gallbladder: more curcumin, more contraction12 healthy adults · each tried all three single doses · gallbladder volume by ultrasound. 80 mg curcumin: 72.25 % smaller at 2 hours; 40 mg curcumin: 51.15 % smaller at 2 hours; 20 mg curcumin: 34.1 % smaller at 2 hours12 healthy adults · each tried all three single doses ·gallbladder volume by ultrasound80 mg curcumin72.25 % smaller at 2 hours40 mg curcumin51.15 % smaller at 2 hours20 mg curcumin34.1 % smaller at 2 hours
    Source: Rasyid et al. · Asia Pacific Journal of Clinical Nutrition, 2002 [28]How much the gallbladder shrank two hours after each dose. A longer bar means a stronger squeeze, which empties more bile into the gut.

    Artichoke extract has been tested in people, too. In a pilot study of 20 people who each tried both artichoke extract and a placebo, with neither the people nor the researchers knowing which was which, 1.92 grams of extract delivered by tube into the small intestine raised bile flow 151.5% above its starting level at 60 minutes. The placebo raised flow early too, but the extract's effect lasted longer, with bile flow still significantly higher than on placebo at two hours and beyond.29 In a six-week placebo-controlled trial of 247 adults with functional dyspepsia (244 analyzed), 640 mg of artichoke leaf extract three times a day improved overall symptoms more than placebo (8.3 versus 6.7 points on a symptom score), along with quality of life.30 Both tested a concentrated extract; on your plate, artichokes are a simple bitter vegetable to add to your week.

    Can bile salts prevent or dissolve gallstones?

    Quick answer

    Food and a prescription bile acid both help prevent gallstones during rapid weight loss: in a review of 13 randomized trials in 1,836 adults losing weight, the trials that compared diets found far fewer gallstones on weight-loss diets with more fat than on low-fat diets, and ursodeoxycholic acid (UDCA) cut the risk by about two-thirds.31 The UDCA trials used the prescription product, and dissolving stones that have already formed is a prescription treatment for a few carefully chosen people.32

    Losing weight quickly raises the risk of gallstones, and what you eat while you lose weight matters. In a review of 13 randomized trials in 1,836 adults losing weight by diet or surgery, the trials that compared weight-loss diets with more fat against low-fat diets found about a tenth of the gallstone risk with more fat, a result that held in the best-designed trials, though the authors' strictest check couldn't confirm it.31 Fat is the signal that empties your gallbladder, which may be part of the reason.7 If you're losing weight, keep healthy fats such as olive oil, avocado and fatty fish on your plate.

    The prescription bile acid UDCA lowers the risk too. In a trial of 1,004 adults with obesity starting a 16-week, 520-calorie-a-day liquid diet, in which neither the people nor the researchers knew who got what, new gallstones formed in 28% of people on placebo, 8% on 300 mg of UDCA a day, 3% on 600 mg and 2% on 1,200 mg.33 In the same review, UDCA cut the risk of gallstones to a third of the control groups' risk.31 A 2026 review of 10 randomized trials in 3,575 people after bariatric surgery found 67% fewer gallstones at 12 to 24 months and 70% fewer symptomatic ones, with no significant difference in how many people later needed their gallbladder removed.34

    Gallstones on a very-low-calorie diet: 28% on placebo, 3% on 600 mg of UDCA

    Gallstones on a very-low-calorie diet: 28% on placebo, 3% on 600 mg of UDCA1,004 adults with obesity · 16-week, 520-calorie-a-day diet · prescription UDCA or placebo. Placebo: 28 % with new gallstones; UDCA, 300 mg a day: 8 % with new gallstones; UDCA, 600 mg a day: 3 % with new gallstones; UDCA, 1,200 mg a day: 2 % with new gallstones1,004 adults with obesity · 16-week, 520-calorie-a-day diet· prescription UDCA or placeboPlacebo28 % with new gallstonesUDCA, 300 mg aday8 % with new gallstonesUDCA, 600 mg aday3 % with new gallstonesUDCA, 1,200 mg aday2 % with new gallstones
    Source: Shiffman et al. · Annals of Internal Medicine, 1995 [33]Share of people who formed new gallstones during a 16-week very-low-calorie diet. A shorter bar means fewer new gallstones.

    For gallstones that have already formed, prescription bile acids, UDCA and chenodeoxycholic acid, can slowly dissolve them when symptoms are mild and surgery isn't an option, with good success in well-chosen people; few people are candidates, treatment takes a long time, and stones often return after it stops.32

    Ox bile vs. TUDCA: which should you take?

    Both are bile support, and you can use either or both. My Healing Leaky Gut Protocol uses ox bile for people without a gallbladder, and TUDCA is the one I take myself with higher-fat meals.635 Ox bile has corrected severe fat loss in documented cases of bile loss, and TUDCA has been tested in controlled trials after gallbladder removal and in liver disease.542

    Ox bileTUDCA

    What it is

    Dried bile from cattle (bovine), a natural mix of bile salts11

    Ursodeoxycholic acid joined to taurine2

    Studied for

    Fat absorption when bile runs short (case reports); blood sugar (one trial of a delayed-release form)517

    Digestion after gallbladder removal, liver enzymes, insulin sensitivity4216

    Dr. Axe's amount

    125 to 500 mg with fatty meals6

    Around 500 mg with meals that contain fat8

    Main thing to watch

    Loose stools (see the side effects section)36

    Loose stools; side effects didn't differ from placebo at 2 grams a day for 16 weeks37

    Want help fitting bile salts into your routine?

    Ask Dr. Axe AI. Answers are grounded in this library, with sources shown.

    How much bile salts should you take?

    Quick answer

    For people without a gallbladder or with gallbladder issues, I recommend ox bile at 125 to 500 mg with fatty meals, the dose in my Healing Leaky Gut Protocol, or TUDCA at around 500 mg with meals that contain fat.68 There's no established daily dose; in trials, TUDCA ran from 500 mg to 2 grams a day.437

    FormAmountWhen or how longSource

    Ox bile

    125 to 500 mg

    With fatty meals

    Dr. Axe's Healing Leaky Gut Protocol6

    TUDCA

    About 500 mg

    With meals that contain fat

    Dr. Axe, on his show8

    TUDCA

    500 mg a day

    Checked at 1, 2 and 3 months after gallbladder removal

    Controlled trial, 203 adults4

    TUDCA

    750 mg a day (250 mg three times a day)

    24 weeks

    Randomized trial, 199 adults with a bile-duct disease2

    TUDCA

    1,750 mg a day

    4 weeks

    Placebo-controlled trial, 20 adults16

    TUDCA

    2 g a day

    16 weeks

    Placebo-controlled trial, 54 adults with multiple sclerosis, 47 analyzed (safety)37

    Natural bile acids from ox bile

    2 g per meal

    4 months

    Case report, short bowel syndrome11

    The table shows what was used. For everyday use, take bile salts with meals that contain fat, since fat is what tells your gallbladder to release bile.7 Start at the low end, 125 mg of ox bile, and move up only if fat still sits heavily; loose stools are the sign to cut back.

    When you shop, check the label for:

    • The source animal, with ox bile from cattle (bovine), or the compound name for TUDCA

    • Milligrams per capsule, so you can land in the 125- to 500-mg range

    • Third-party testing for identity and contaminants, the quality rule in my protocols6

    • The capsule, bovine gelatin or plant-based

    • Any added enzymes, choosing lipase made from plants or microbes

    Bile salt side effects & who should be careful

    Quick answer

    Bile salts are well tolerated in trials, and diarrhea is the main side effect, more likely at higher doses and when much of the small intestine has been removed.43736 Skip them with a blocked bile duct or an inflamed gallbladder, and during pregnancy.12

    In the TUDCA trials, side effects matched the comparison groups: 2 versus 3 people in the controlled trial after gallbladder surgery, comparable rates against prescription UDCA in a randomized trial of 199 people, and no difference from placebo at 2 grams a day for 16 weeks in a placebo-controlled trial of 54 adults with multiple sclerosis (47 analyzed).4237

    • Diarrhea. Bile acids that reach your colon draw in water and speed things along.14 With the prescription bile acid, diarrhea affected 27.1% of people versus 21.4% on placebo in a placebo-controlled gallstone trial, and in a small uncontrolled study, ox bile cut fat loss but greatly increased diarrhea in two people with short bowels and a remaining colon.1236

    • Diarrhea that began after gallbladder surgery. Across 21 studies of 3,476 people, 13.3% developed diarrhea after gallbladder removal, and reviewers advise testing early for bile acid diarrhea.39 Have it checked before you add bile salts, which could add to it.

    • A blocked bile duct or a gallbladder attack. Bile acids aren't used with a blocked bile duct or an acutely inflamed gallbladder or bile duct.12 In a placebo-controlled trial of 177 people with painful gallstones waiting for surgery, UDCA didn't prevent attacks (26% stayed attack-free versus 33% on placebo, a difference that wasn't significant), and among people whose gallbladders contracted weakly, fewer stayed attack-free on UDCA, 21% versus 47%.40 During or after a gallbladder attack, see a doctor right away for belly pain lasting several hours, nausea and vomiting, fever or chills, yellowing of your skin or the whites of your eyes, or tea-colored urine and light-colored stools.41

    • Medications. The interaction check above covers bile acid binders, aluminum antacids, ciclosporin and estrogen.

    • Pregnancy. The prescription bile acid's label notes no adequate, well-controlled studies in pregnant women, so skip bile salt supplements while pregnant unless your obstetric team prescribes a bile acid.1242 Itching in late pregnancy has its own answer in the FAQ below.

    What is bile salt malabsorption?

    Bile salt malabsorption, also called bile acid diarrhea, means too many bile acids reach your colon, where they draw in water and cause chronic diarrhea.1443 It's estimated to affect about 1% of people, it shows up in 25% to 50% of people with diarrhea-predominant IBS, and it's usually seen with Crohn's disease of the lower small intestine or after that section is removed.14 Among people whose chronic diarrhea has no other explanation, up to 5% of the population, bile acid diarrhea is the cause in up to half.43 Bile salt supplements don't fit the diarrhea itself; the exception is when so much bile is lost that the supply runs short and fat passes through unabsorbed, the problem ox bile corrected in the case reports above.5 Your doctor can test for bile acid diarrhea, with a scan that measures how much of a labeled bile acid your body holds on to or blood tests for C4 and FGF19, and treatment uses drugs that bind bile acids, along with diet and vitamin support.1443

    The bottom line

    Are bile salts worth taking?

    If you don't have a gallbladder, or fat sits heavily because your bile isn't flowing well, yes. Bile salts put back what your body makes and recycles every day. Ox bile has corrected severe fat loss in documented cases, and in trials, TUDCA eased indigestion faster in the first month after gallbladder surgery and lowered liver enzymes.

    For anyone without a gallbladder or with gallbladder issues, I recommend ox bile at 125 to 500 mg or TUDCA at around 500 mg with fatty meals, starting low. Skip them during pregnancy and with a blocked bile duct, get new diarrhea after surgery checked first, and keep them apart from bile acid binders. Eat sour and bitter foods and steamed cruciferous vegetables, sit down and relax at meals, and give your body what it needs to do what it was designed to do.

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    Bile salts: frequently asked questions

    What do bile salts do?

    Bile salts help you digest and absorb fat, along with cholesterol and vitamins A, D, E and K.7 Your liver makes them from cholesterol, your gallbladder stores them, and about 95% are reabsorbed and reused.1

    Who should take bile salts?

    People who've had their gallbladder removed, and people with gallbladder issues who have trouble digesting fat, such as fatty food intolerance. For them, I recommend bile support with fatty meals.6

    Do you need bile salts if you don't have a gallbladder?

    Bile support can help: without a gallbladder, your liver still makes bile, but the pool of bile acids runs smaller and cycles faster.3 In a controlled trial of 203 people after surgery, 500 mg of TUDCA a day eased indigestion faster in the first month than no treatment.4

    Can you take bile salts if you still have a gallbladder?

    Yes, if fat sits heavily or your stools turn greasy after fatty meals: I recommend bile support for gallbladder issues as well as after removal.6 During a gallbladder attack or with a blocked bile duct, skip them and get care.12

    Is ox bile or TUDCA better?

    Either works as bile support: my protocol uses ox bile for people without a gallbladder, and TUDCA is the one I take with higher-fat meals.635 Ox bile has corrected severe fat loss in documented cases, and in a controlled trial of 203 people, TUDCA eased indigestion faster in the first month after gallbladder removal.54

    Can you take bile salts with digestive enzymes?

    Yes, and my Healing Leaky Gut Protocol pairs them: its Replace step adds digestive enzymes with each meal and ox bile at 125 to 500 mg with fatty meals for people without a gallbladder.6 Choose an enzyme blend whose lipase is made from plants or microbes.

    How much bile salts should I take?

    I recommend ox bile at 125 to 500 mg with fatty meals, or TUDCA at around 500 mg with meals that contain fat.68

    When should I take bile salts?

    Take them with meals that contain fat, since fat is what signals your gallbladder to release bile.7 I take TUDCA with any meal that has more than about 10 grams of fat.9

    Can bile salts cause diarrhea?

    Yes, diarrhea is the main side effect, because bile acids that reach your colon draw in water.14 It's more likely at higher doses and when much of the small intestine is missing, so start low, and if loose stools began after gallbladder surgery, have them checked first.3639

    Should you take bile salts on a keto diet?

    If fat digestion becomes a problem on a high-fat diet such as keto, with fat sitting heavily or greasy stools, bile support with meals can help, since fat is the signal that releases bile.7 If you're digesting fat comfortably, you don't need it.

    Can bile salts dissolve gallstones?

    Prescription bile acids can, in a few carefully chosen people: UDCA and chenodeoxycholic acid slowly dissolve some gallstones when symptoms are mild, though treatment is long and stones often return after it stops.32 Prevention during rapid weight loss is covered in the gallstone section.

    What is bile salt malabsorption?

    It means too many bile acids reach your colon, where they draw in water and cause chronic diarrhea; it's also called bile acid diarrhea.14 It's estimated to affect about 1% of people, and it's tested and treated differently from low bile, so bile salt supplements don't fit it.14

    What do high bile salts in pregnancy mean?

    Itching with raised bile acids in late pregnancy can signal intrahepatic cholestasis of pregnancy, a liver condition your obstetric team should check promptly.42 It poses little risk for the mother and a real risk for the baby, so the team measures bile acids and liver enzymes and plans the timing of delivery by the level.42

    Do bile salts help you absorb vitamin D?

    Bile carries vitamin D, along with vitamins A, E and K, into your body, so good bile flow supports absorbing it.7 As I've explained on my show, the amount of fat-soluble vitamins you absorb is oftentimes determined by bile flow.25

    Is ox bile safe?

    Side effects were few in the case reports and in a 28-day placebo-controlled trial, and loose stools are the one to watch, especially at high doses or with much of the small intestine missing.111736 Ox bile comes from cattle, so it's a bovine product; skip it with a blocked bile duct or during pregnancy.12

    Freshness & update log

    October 9, 2026 — Trimmed repeated book references.

    October 6, 2026 — Matched Dr. Axe's quotes to his own words, with their sources.

    October 3, 2026 — Rewrote the page in full. Rescored it under the current supplement weighting (5.9) with a short score box and an interaction check (Moderate), replacing the retired "Magnitude of Benefit" factor; added Dr. Axe's recommendation of bile support with fatty meals for people without a gallbladder or with gallbladder issues; added the controlled trial of TUDCA after gallbladder removal and the placebo-controlled trial of a delayed-release ox bile product, corrected the earlier statement that no randomized trial of an over-the-counter bile salt existed, and added the ox bile case reports with their numbers; added the TUDCA liver and insulin trials, three charts and a step diagram of how bile handles a meal; corrected the gallstone-dissolution answer, which credited a combination trial's numbers to UDCA alone, and the claim that no test exists for bile acid problems; replaced the myths table with what the research supports; brought all side effects and red flags into one section; and corrected the credentials to DC, DNM, CNS.

    Originally published September 2, 2018. —

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    Dr. Josh Axe

    Dr. Josh Axe, DC, DNM, CNS

    Doctor of Natural Medicine · Founder, DrAxe.com

    Dr. Axe is a certified doctor of natural medicine, clinical nutritionist, and multiple New York Times bestselling author. He has spent 20+ years in clinical practice helping people heal at the root cause and founded one of the most-visited natural-health platforms in the world.

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    This article is for educational purposes. See our medical disclaimer.