If you are buying TUDCA for the first time, the TUDCA dosage label feels deliberately vague. Bottles list “500 mg per capsule” but say little about when to take it, how long to stay on it, or if you should split it across the day. That is why most Australians under-dose. Or they over-dose. Or they give up before the compound has time to work.
This guide settles the question. We cover the dose ranges used in clinical research. We cover the practical timing that shifts bile flow and mitochondrial support. We cover how long it takes to feel the effects, plus the specific protocols people run for liver, gut, athletic, and longevity goals. Every claim is tied to peer-reviewed research. You can see where each number comes from.
How Much TUDCA Should You Take Per Day?
The research-backed daily range for tauroursodeoxycholic acid sits between 250 mg and 1,750 mg per day. That is a wide window. It exists because TUDCA has been studied across three use cases. Cholestatic liver conditions at the high end. Insulin sensitivity and fatty liver support in the middle. General mitochondrial or bile-flow upkeep at the low end.
For a healthy adult using TUDCA to support the liver and bile flow, 500 mg once daily is the standard dose. It matches most clinical protocols for outpatient use. Every Eternal Elixir TUDCA capsule is dosed at exactly 500 mg. It is the number that shows up most often in the research. It also lets you dial up or down in clean steps, with no need to split capsules.
Here is how the dosing tiers break down in practice:
- Maintenance (250–500 mg/day): Long-term daily use for healthy adults running a longevity stack, or for people taking TUDCA to offset high-fat eating, alcohol exposure, or intense training. One 500 mg capsule per day covers this tier.
- Standard therapeutic (500–1,000 mg/day): The dose most commonly studied for people with elevated liver enzymes, early fatty liver changes, or insulin sensitivity concerns. Often split into two doses — 500 mg in the morning and 500 mg in the evening.
- Short-term high dose (1,000–1,750 mg/day): Used in clinical protocols for more pronounced liver stress, cholestatic conditions, or focused detox windows. Typically capped at 30–60 days before stepping back down to a maintenance dose.
The upper tier is not a forever dose. A 2018 review in the British Journal of Pharmacology by Wang et al. showed TUDCA helps the gut barrier, gut inflammation, and fatty liver in animal models. The effects are dose-dependent, but they plateau once you hit a threshold. More is not linearly better (Wang et al., 2018). Doubling your dose does not double your results; it just increases the likelihood of mild gastrointestinal side effects.
What About Dr Berg and Other High-Dose Protocols?
You will see influencer content online pushing 1,000–2,000 mg daily as a default. That number is pulled from short clinical trials. It is not meant for long-term use. A sensible baseline for an Australian adult with no liver condition is 500 mg per day. Run it for 8 to 12 weeks. Then reassess. Are you running TUDCA with a performance stack or a heavy training block? Take 1,000 mg split across two doses. Hold it for 4 to 8 weeks.
Best Time to Take TUDCA: Morning, Night, or With Food?
TUDCA is a bile acid. Your gallbladder releases bile when you eat fat. So the smart move is to time your dose with your largest fat-heavy meal. The two defensible timing strategies are:
Option 1: With Your Largest Fat-Containing Meal
Take 500 mg with dinner. Or with your biggest meal of the day. This rides your natural bile release. It also supports digestion of the meal itself. Most Australians eat dinner with olive oil, butter, or animal fats. For them, this is the simplest protocol.
Option 2: Empty Stomach, Morning
Take 500 mg first thing with a glass of water. Wait 20 to 30 minutes before breakfast. The argument is that an empty stomach boosts systemic absorption. That matters for brain and mitochondrial targets, not gut targets. This option fits if your goal is cell stress support, brain health, or a longevity stack. It fits less well if your goal is bile flow.
Both options work. The real mistake is taking it at random times. Some days morning. Some days night. Pick one anchor (breakfast or dinner), stick with it for 8 weeks, and only then reassess.
Splitting a 1,000 mg Dose
On the therapeutic tier? Split the dose. 500 mg with breakfast. 500 mg with dinner. This keeps serum levels steady across the day. It is also easier on the stomach than one big 1,000 mg dose. TUDCA has a short serum half-life after a dose. Splitting also makes sense for steady support.
How Long Does TUDCA Take to Work?
TUDCA is not a stimulant. You will not feel a rush like caffeine or a pre-workout. The timeline depends on what you track:
- Digestion and post-meal comfort: Some people notice less bloating and easier digestion of fatty meals within 3–7 days. This is the bile-flow effect and is the fastest-responding outcome.
- Energy and mental clarity: Often reported at the 2–4 week mark by people using TUDCA as part of a mitochondrial support stack. The endoplasmic reticulum stress pathway is not an overnight mechanism.
- Liver enzyme changes (ALT, AST, GGT): Blood-marker shifts typically appear on a 8–12 week follow-up panel. If you are tracking liver enzymes, run a baseline panel before starting and repeat at 12 weeks.
- Gut and microbiome changes: Research shows TUDCA modulates gut microbiota composition and improves intestinal barrier function, but these shifts take 4–8 weeks of consistent use to consolidate (Wang et al., 2018).
Two weeks in with no clear effect? That is normal. TUDCA works on cell stress and bile chemistry. The results are slower, but they last longer than any stimulant effect.
Stacking TUDCA: What to Pair It With (and What to Avoid)
TUDCA + NAC
N-acetylcysteine (NAC) is the most common TUDCA stack partner. NAC refills glutathione, the liver’s main antioxidant. TUDCA handles bile-acid stress and cell stress. Together they cover two arms of liver support. A common protocol is 500 mg TUDCA + 600–1,200 mg NAC daily, split morning and evening.
TUDCA + Milk Thistle
Milk thistle (silymarin) is the classic liver herb. It works through antioxidant and anti-scarring paths. TUDCA shifts the bile acid pool. It also lowers cell stress. They are complementary, not redundant. Running both? Try 500 mg TUDCA with 400 to 600 mg silymarin (standardised to 80% silymarin content). For a deeper look at how these two compare head-to-head, see our TUDCA vs Milk Thistle comparison.
TUDCA + Berberine
This is the underrated metabolic stack. Berberine activates AMPK. It also improves insulin sensitivity on the glucose side. TUDCA lowers cell stress in liver cells. It also helps the gut-liver axis. A 2025 review in the European Journal of Pharmacology covered both compounds. It framed them as therapies for cell stress in metabolic disease (Alotaibi and Alkhammash, 2025). Run 500 mg TUDCA with dinner and 500 mg berberine with each main meal.
TUDCA + NMN / Resveratrol (longevity stack)
Running a full longevity stack? TUDCA fits as the liver and mitochondrial arm. NMN raises NAD+. Resveratrol turns on sirtuins. TUDCA handles protein-folding stress. These compounds target different marks of ageing. They do not clash with each other.
What to Avoid
Do not combine TUDCA with prescription bile-acid binders like cholestyramine or colestipol. They will bind the TUDCA in your gut. That makes it useless. Leave at least 4 hours between doses if you take both. On UDCA (ursodeoxycholic acid) from a doctor? Do not add over-the-counter TUDCA without asking them first. You would be stacking two similar compounds.
TUDCA Dosage for Specific Goals
Fatty Liver / Elevated Liver Enzymes
Protocol: 500 mg twice daily (morning and evening, with food), for 12 weeks, then retest enzymes. If markers improve, step down to 500 mg once daily as maintenance. If markers do not move, the issue is likely upstream (diet, alcohol, fructose, excess visceral fat) and no amount of TUDCA will fix it alone.
Gut Health and Bile Flow
Protocol: 500 mg with your largest meal, daily, for 8 weeks. Research shows TUDCA improves intestinal tight junction integrity and modulates microbiota composition, so this is a meaningful gut-axis intervention, not just a liver product (Wang et al., 2018).
Athletic Recovery and Performance
Protocol: 500 mg twice daily during heavy training blocks (6–8 weeks). Athletes use TUDCA to offset the hepatic and mitochondrial stress of high-volume training, hot weather dehydration, and glycolytic load. Drop to 500 mg once daily during deload and off-season.
Longevity Stack
Protocol: 500 mg daily, continuous, alongside NMN, resveratrol, and spermidine. This is the maintenance tier — you are not treating a condition, you are reducing baseline cellular stress over decades.
Cognitive and Neurological Support
Protocol: 500 mg daily on an empty stomach, morning. TUDCA crosses the blood-brain barrier and has been studied for endoplasmic reticulum stress in neurodegenerative contexts. A landmark 2020 trial in the New England Journal of Medicine tested a taurursodiol-containing combination therapy in amyotrophic lateral sclerosis and observed slower functional decline compared to placebo over 24 weeks (Paganoni et al., 2020). That was a specific clinical population at a specific dose, but it confirms TUDCA has meaningful neurological bioavailability.
How Long Should You Stay on TUDCA?
There is no hard cap, but there is a sensible framework. For most goals, cycle in 8–12 week blocks with short breaks (1–2 weeks) between blocks. This prevents your body from over-adapting and gives you a clean baseline to compare against when you restart.
For longevity maintenance (500 mg daily), continuous use is defensible — the compound is naturally produced in small amounts by your own gut bacteria, so supplementing within the physiological range is not introducing anything foreign. That said, running blood work every 6 months to check liver enzymes, bilirubin, and lipid panels is still good practice for anyone on any long-term supplement protocol.
For high-dose protocols (1,000–1,500 mg/day), cap at 30–60 days before stepping down. There is no research supporting therapeutic-tier dosing for indefinite periods in healthy adults.
Side Effects and Who Should Not Take TUDCA
TUDCA is well tolerated at standard doses. The most common complaint is mild diarrhoea or loose stools during the first few days — usually resolved by taking it with food rather than empty stomach. Less commonly, people report stomach cramping or nausea; again, food helps.
You should not take TUDCA if you are pregnant or breastfeeding, have an active bile duct obstruction, or are currently taking prescription bile acid medications without medical supervision. If you have had your gallbladder removed, TUDCA can still be useful — arguably more so, since you have lost your bile-concentration reservoir — but dose conservatively and start at 250 mg to assess tolerance.
Always discuss any new supplement with your GP or integrative practitioner, particularly if you have a diagnosed liver condition or are on prescription medication. For a broader look at when TUDCA is and is not appropriate, see our guide on signs your liver needs support.
Choosing a Quality TUDCA Supplement in Australia
TUDCA quality varies wildly. The ingredient itself is expensive to manufacture, so cheap bottles almost always signal a low-percentage product mixed with fillers. When you are checking a label, you want:
- 500 mg of actual TUDCA per capsule, not a proprietary blend that hides the real dose behind filler powders.
- Purity testing — reputable brands publish third-party certificates of analysis on request.
- Capsule count that makes sense for a real protocol. Most overseas TUDCA bottles ship just 30 or 45 caps per bottle, which is two to four weeks at standard dosing. Every Eternal Elixir bottle ships 90 capsules, which means one bottle covers a full 12-week protocol at 500 mg/day — significantly better cost-per-dose than the 30-capsule bottles dominating the Australian market.
- Clean capsule shell — vegetable-based cellulose, no titanium dioxide, no unnecessary colourants.
If you are comparing brands side-by-side, our Best TUDCA Supplements in Australia 2026 roundup runs through seven Australian-available options with transparency about dosing, pricing per capsule, and purity. For stacking ideas across the full longevity range, the Eternal Elixir shop has everything covered above.
Frequently Asked Questions
Is 500 mg of TUDCA enough per day?
For general liver support, gut health, and longevity maintenance in a healthy adult, yes — 500 mg daily is the standard effective dose used in most research protocols. Move to 1,000 mg (split as 500 mg twice daily) only if you have a specific liver-enzyme concern or are running a therapeutic-tier protocol, and reassess at 12 weeks.
Can I take TUDCA every day, long-term?
At 250–500 mg daily, long-term use appears well tolerated and is consistent with how people run it inside longevity stacks. Cycle higher doses (1,000 mg+) in 30–60 day blocks with breaks. Get a liver panel every 6 months if you are on any long-term supplement protocol.
Should I take TUDCA with food or on an empty stomach?
With food is the safer default, particularly if your primary goal is bile flow and digestive support. Empty stomach in the morning is reasonable if you are targeting mitochondrial or cognitive outcomes. Either way, pick one and stay consistent — moving the timing around weekly will produce inconsistent results.
How long does TUDCA stay in your system?
After oral administration, TUDCA has a relatively short serum half-life of a few hours, which is why splitting larger doses makes sense. The downstream effects on bile acid pool composition, microbiome, and endoplasmic reticulum stress persist much longer — they build over weeks of consistent dosing rather than rising and falling with each capsule.
Does TUDCA help with fatty liver?
Research in animal models of non-alcoholic fatty liver disease shows TUDCA reduces hepatic steatosis, insulin resistance, and gut inflammation (Wang et al., 2018). Human studies are fewer but promising. TUDCA is not a substitute for addressing the underlying drivers (excess caloric intake, fructose load, alcohol, inactivity) — it is a useful adjunct when the foundational lifestyle work is already in place.
Can I take TUDCA and NAC together?
Yes, and they pair well. TUDCA works on bile-acid toxicity and endoplasmic reticulum stress; NAC replenishes glutathione. A common stack is 500 mg TUDCA + 600–1,200 mg NAC daily. They can be taken at the same time with a meal.
Is TUDCA legal to buy in Australia?
Yes. TUDCA is sold as a dietary supplement in Australia and is freely available through Australian supplement retailers. Note that UDCA (the unconjugated form, ursodeoxycholic acid) is a prescription medication here — TUDCA is the taurine-conjugated version sold over the counter.
