Most human studies on TUDCA use doses between 250 and 2,000 mg per day, with 500 to 1,500 mg per day being the most common range for liver-related conditions. There is no single officially established dose, though, because large-scale dose-response studies haven’t been conducted yet. The right amount depends heavily on what you’re taking it for.
Doses Used in Human Studies
The research spans a surprisingly wide range. At the low end, doses as small as 10 to 13 mg per day have shown improvements in liver regeneration rates in people with chronic liver disease. At the high end, studies in ALS (a neurodegenerative condition) have used 2,000 mg per day for up to 18 months.
For most purposes, the doses cluster in a narrower band. Liver cirrhosis studies have used 750 mg daily. A dose-response study in patients with primary biliary cholangitis tested 500, 1,000, and 1,500 mg per day over six months and found that the higher doses (1,000 and 1,500 mg) lowered both total and HDL cholesterol, while the 500 mg dose did not produce measurable changes. For primary biliary cholangitis more broadly, 500 to 1,500 mg per day for up to six months is the range that has shown benefit, though the evidence base remains limited.
If you’re taking TUDCA as a general liver support supplement rather than for a diagnosed condition, most supplement manufacturers and practitioners reference the 250 to 500 mg per day range. This sits at the lower end of what’s been studied clinically, but it reflects the reality that healthy individuals without liver disease likely need far less than someone managing cirrhosis or cholestasis.
Upper Limits and Safety
TUDCA has a favorable safety profile in clinical research. Doses up to 2,000 mg (2 grams) per day have shown no known risks in both short-term and long-term human studies. A dose of 1,750 mg per day has been used across multiple registered clinical trials and is generally well tolerated.
The six-month study at 1,500 mg per day is one of the longer trials available. ALS research has pushed duration even further, with patients taking 1,000 mg twice daily (2,000 mg total) for up to 18 months without notable safety concerns. Side effects in clinical literature are mild and infrequent, mostly limited to digestive discomfort. That said, doses above 1,500 mg per day are typically reserved for serious medical conditions and administered under supervision.
How TUDCA Works in Your Body
TUDCA is a water-soluble bile acid, which means it’s gentler on cells than regular bile acids. Its primary benefit comes from acting as a “chemical chaperone,” a substance that helps proteins inside your cells fold correctly. When cells are stressed, proteins can misfold and accumulate, triggering a cascade of inflammation and cell death. TUDCA interrupts that cascade, reducing cellular stress and preventing the kind of damage that leads to tissue injury.
In the liver specifically, TUDCA improves bile flow and protects liver cells from the toxic effects of other, harsher bile acids that build up during cholestasis (a condition where bile can’t flow properly). This is why it’s been studied most extensively in liver disease. The same cell-protective mechanism is also why researchers have explored it for neurological conditions, metabolic disorders, and even pancreatic health.
Timing and How to Take It
There’s no definitive research on whether TUDCA works better with or without food. In most clinical studies, it was not taken with food, which is why many practitioners suggest taking it on an empty stomach or at least 20 to 30 minutes before meals. This aligns with how bile acids naturally function in digestion.
For doses above 500 mg per day, splitting into two or three doses throughout the day is common in clinical protocols. The ALS trials, for example, used 1,000 mg twice daily rather than a single 2,000 mg dose. Splitting larger doses likely improves absorption and reduces any chance of digestive discomfort. For lower supplement doses of 250 to 500 mg, a single daily dose is typical.
Choosing Your Dose by Goal
- General liver support (no diagnosed condition): 250 to 500 mg per day is the range most commonly used in supplement form. This is a reasonable starting point given the safety data, though direct evidence for preventive benefits in healthy people is thin.
- Liver disease or cholestasis: Clinical studies have used 500 to 1,500 mg per day, with higher doses showing more measurable effects on liver markers. These doses were used under medical supervision for up to six months.
- Steroid or oral supplement liver protection: People in the bodybuilding community commonly take 500 to 1,000 mg per day during cycles of oral steroids to offset liver stress. This falls within the studied range, but direct trials for this specific use are lacking.
- Neurological or metabolic conditions: Research doses reach 1,500 to 2,000 mg per day, but these are clinical settings with medical monitoring.
The precise effective dosage for TUDCA remains uncertain for every condition studied so far. No large-scale dose-optimization trials have been completed. What the existing research tells us is that the 500 to 1,500 mg per day range has the most clinical support, doses up to 2,000 mg per day appear safe, and lower doses around 250 to 500 mg are a reasonable choice for general supplementation.