Urolithin A and the Liver: What to Know
The liver processes almost everything you swallow, so it is a smart organ to think about before starting any daily supplement. Here is how the liver handles urolithin A, what human research shows about tolerability, what remains preclinical, and why anyone with a liver condition should involve their clinician first.
Why the liver is the right thing to ask about
The liver is the body's central metabolic hub. It receives blood straight from the digestive tract, packages nutrients and chemically transforms a huge range of compounds so they can be used or eliminated. It does this in two broad phases. Phase I enzymes (the cytochrome P450 family) modify a molecule, and phase II enzymes attach a water-soluble tag, such as a glucuronide or sulfate group, so the kidneys or bile can clear it. Because nearly every oral supplement passes through this system, asking how the liver handles a new ingredient is exactly the right instinct.
Urolithin A is a gut postbiotic: your microbiome makes it from ellagitannins in pomegranate, walnuts and certain berries, though many people's gut bacteria convert those precursors poorly, which is part of why a standardized supplement exists. After absorption, urolithin A is extensively handled by phase II conjugation in the gut wall and liver, mainly into urolithin A glucuronide, with some sulfate forms. These conjugated metabolites are what mostly circulate in blood. This is ordinary handling for dietary polyphenol metabolites, the same route the body uses for compounds from tea, berries and cocoa.
What urolithin A is actually designed to support
Urolithin A is studied for one core reason: mitophagy. Mitochondria are the power plants inside your cells, and some inevitably become worn over time. Mitophagy is the quality-control process that flags underperforming mitochondria and recycles them. Our urolithin A guide and mitophagy explainer unpack the mechanism. The important framing for this page: urolithin A is studied as general mitochondrial and muscle support, not as a liver product.
What the human evidence shows about tolerability
First-in-human safety (HUMAN)
Andreux and colleagues ran the first-in-human study and reported that urolithin A was safe and well tolerated at daily doses up to 1,000 mg for four weeks, alongside a measurable mitochondrial gene-expression signature in muscle (Nature Metabolism, 2019). Participants were generally healthy older adults, not people with liver disease.
Repeated-dosing trials (HUMAN)
Later controlled trials gave urolithin A daily to generally healthy adults for up to four months: older adults in JAMA Network Open (2022), middle-aged adults taking 500 or 1,000 mg in Cell Reports Medicine (2022), resistance-trained men for eight weeks in the Journal of the International Society of Sports Nutrition (2024), and trained distance runners for four weeks in Sports Medicine (2025). Across these studies urolithin A was generally well tolerated. A 2024 systematic review of the human data likewise did not identify safety concerns at the studied doses, while noting that trials so far are short (Kuerec et al., Ageing Research Reviews 2024). None of these trials was designed to evaluate people with liver disease.
Where the liver research is still preclinical
You may see claims online that urolithin A is “liver-supportive.” Read those carefully. That discussion draws on PRECLINICAL research: studies in cultured liver cells and in rodent models exploring how urolithin A behaves in liver tissue. This work is scientifically interesting, but cells and mice are not people, and a signal in a model is a reason to keep studying, not evidence that a supplement will do anything for your liver. SOMA HEALTH does not claim that urolithin A treats, protects or improves any liver condition, because the human evidence to support such a claim does not exist.
Practical guidance if your liver is a consideration
Involve your clinician if you have any liver condition
If you have fatty liver, hepatitis, cirrhosis, elevated liver enzymes or any other liver diagnosis, do not start urolithin A on your own. A compromised liver changes how the body processes many substances, so your care team should weigh in on anything you take daily. If your clinician agrees to a trial, it is reasonable to ask whether to recheck liver blood tests at your next routine visit.
Stay within the studied dose
The clinically studied range is 500 to 1,000 mg per day. There is no evidence of benefit above what has been tested, and doubling up adds load without data behind it. See our dosage page, and our blog overview of urolithin A side effects and safety for what the trials reported.
Review everything else you take
If you regularly drink alcohol, use acetaminophen or take prescription medications or other supplements processed by the liver, review your full routine with a pharmacist or clinician. Our page on urolithin A drug interactions explains what is and is not known. This is general good practice, not a warning specific to urolithin A.
Watch for warning signs of any liver problem
Regardless of what you take, yellowing of the skin or eyes, dark urine, pale stools, persistent upper-right abdominal pain or unusual fatigue with nausea warrant prompt medical attention. Stop any new supplement and contact your doctor if these appear.
Choose a third-party tested product
Purity matters for anything taken daily, because contaminants, not the labeled ingredient, are a common source of supplement-related problems. The SOMA HEALTH Urolithin A Gummies provide 1,000 mg per four-gummy serving, are third-party tested and are sugar-free. Our page on quality and testing explains what we check.
Not a treatment; see your doctor. Nothing on this page is intended to diagnose, treat or manage any liver condition. If you have liver symptoms or a diagnosed liver problem, your clinician is the right person to guide what you take.
Frequently asked questions
Is urolithin A hard on the liver?
In human trials of generally healthy adults, urolithin A has been well tolerated at up to 1,000 mg per day for up to four months. Those trials did not include people with liver disease, so if you have a liver condition, ask your clinician first.
Does urolithin A support liver health?
Liver-related findings so far are preclinical, from liver cells and animal models. That work is exploratory, not proof of benefit in people, and SOMA HEALTH makes no liver claim.
How does the liver handle urolithin A?
After absorption, urolithin A is largely conjugated in the gut wall and liver, mainly into glucuronide forms, with some sulfate forms. These conjugated metabolites are what mostly circulate, which is typical for dietary polyphenol metabolites.
Can I take urolithin A if I have fatty liver or elevated enzymes?
That is a decision for your clinician. People with liver conditions have not been studied, and urolithin A is not a treatment for any liver condition.
Will urolithin A interact with alcohol or acetaminophen?
No specific interaction has been reported, but formal interaction studies are limited. If you regularly use alcohol or liver-processed medications, review your routine with a pharmacist or clinician.
What dose was actually studied?
The clinically studied range is 500 to 1,000 mg per day. The SOMA HEALTH gummies deliver 1,000 mg in a four-gummy daily serving.
Should I stop if I notice symptoms?
Yes. Yellowing skin or eyes, dark urine, pale stools or upper-right abdominal pain need prompt medical attention whatever the cause. Stop any new supplement and contact your doctor.
*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. This guide is educational and is not a substitute for advice from a qualified healthcare provider.
A clinically studied 1,000 mg dose of Urolithin A in one simple daily gummy — to support mitophagy, muscle strength, and cellular energy.
Shop SOMA Urolithin A Gummies →