Urolithin A 500mg vs 1000mg: Which Dose Is Right?
Both 500 mg and 1,000 mg of urolithin A per day sit inside the range that human trials have actually tested. The real question is not which number is bigger, but what each dose has been shown to support — and how to avoid the under-dosed products that fall below either.
First, the range that matters
Urolithin A is a gut postbiotic your microbiome makes from ellagitannins in pomegranate, walnuts, and berries. It supports mitophagy, the process cells use to recycle worn-out mitochondria. The clinically studied daily range for the supplemental compound runs from 500 mg to 1,000 mg, with 1,000 mg representing the top of that range. Any serious dose comparison lives entirely inside that window — both 500 mg and 1,000 mg are amounts researchers have put in front of real people, which is exactly why this is a meaningful choice rather than a marketing gimmick.
That framing also tells you what to be wary of. Products offering 100 mg or 250 mg per serving are below the studied range. When you compare doses, you are really choosing between two evidence-backed amounts, not shopping for the cheapest number on a label. For the wider picture, see our urolithin A guide and dosage guide.
What 500 mg has shown in humans
The clearest head-to-head data comes from Singh et al. 2022 (Cell Reports Medicine), a human trial in middle-aged adults that included both a 500 mg arm and a 1,000 mg arm taken over four months. This is a human study, and it reported improvements in muscle strength and exercise performance associated with urolithin A supplementation. Crucially, the 500 mg dose was an active, studied arm — not a placeholder. So 500 mg per day is a legitimate, evidence-supported dose, not a compromise dose.
Supporting human work reinforces that lower-to-mid amounts do meaningful things. The 2025 Nature Aging randomized trial (about 28 days) reported support for immune-cell mitochondrial health in midlife adults, and a 2024 randomized trial in the Journal of the International Society of Sports Nutrition examined endurance and recovery markers in resistance-trained men over eight weeks. Read together, these human trials establish that urolithin A within the studied range supports muscle and mitochondrial function; they do not establish that more is automatically better.
What 1,000 mg has shown in humans
The case for 1,000 mg rests on two pillars. First, Andreux et al. 2019 (Nature Metabolism), the first-in-human study, confirmed urolithin A was safe and well tolerated at doses up to 1,000 mg per day, and it observed a dose-related mitochondrial gene-expression signature in muscle — the higher-dose signal that suggests the top of the range engages the mechanism robustly. Second, Singh 2022 carried a full 1,000 mg arm alongside its 500 mg arm, so the top of the range is directly represented in a controlled human trial rather than extrapolated.
The Liu and D'Amico et al. 2022 trial (JAMA Network Open) in older adults, which found improvement in muscle endurance measured as contractions before fatigue, further supports sustained use in the studied range. The honest summary: 1,000 mg is the most thoroughly characterized dose at the upper end, with a documented safety profile and a clear mechanistic signal, but the human evidence base overall — as a 2024 systematic review in Ageing Research Reviews noted — is still emerging, built on short trials with modest sample sizes.
How to choose between them
If you want the most-studied upper dose
Choose 1,000 mg per day if you prefer the amount with the fullest characterization at the top of the range: an established safety ceiling from Andreux 2019, a dedicated arm in Singh 2022, and a documented dose-related mechanistic signal. This is the straightforward choice for people who want to match the higher end of what has been tested.
If you prefer a lower effective dose
Choose 500 mg per day if you would rather start at the lower boundary of the studied range. It was a genuine active arm in Singh 2022 and remains an evidence-supported amount. Some people simply prefer the smallest dose shown to do something, and 500 mg qualifies.
Practical considerations
Cost, consistency, and format matter too. Because the human benefits were measured over months of daily use, the dose you will actually take every day beats the dose that looks best on paper but sits unused. Whichever you pick, the timeline is the same — see how long urolithin A takes to work. If you are unsure, discussing your goals with your doctor is reasonable, especially since urolithin A supports normal cellular and muscle function and is not a treatment for any medical condition — if you have a health concern, see your doctor rather than self-selecting a dose to address it.
The bigger risk: under-dosed products
The most common mistake is not choosing 500 over 1,000 or vice versa — it is buying a product that provides far less than either. A gummy or capsule delivering 100 to 250 mg of urolithin A is below the range used in every human trial cited here, yet it may cost nearly as much per serving. Read the supplement facts panel for the actual milligrams of urolithin A per serving, not per bottle, and confirm the product is third-party tested so the label matches the contents. Our roundup of the best urolithin A gummies and our benefits overview can help you spot the difference.
A useful rule: if a product will not clearly state its per-serving urolithin A dose, treat that as a reason to move on. Transparency about dose is the baseline for any product asking you to compare 500 mg against 1,000 mg in the first place.
Frequently asked questions
Is 1,000 mg better than 500 mg of urolithin A?
Not automatically. Both sit inside the clinically studied range. 1,000 mg is the most-characterized upper dose — with an established safety ceiling from Andreux 2019 and a dedicated arm in Singh 2022 — while 500 mg was also an active, studied arm in Singh 2022. Bigger is not inherently more effective; it is simply the higher end of what was tested.
Which dose did the studies actually use?
Singh et al. 2022 included both 500 mg and 1,000 mg arms over four months. Andreux et al. 2019 confirmed safety and tolerability up to 1,000 mg per day. Both are human trials.
Is 250 mg enough?
It is below the studied range. Every human trial cited here used 500 mg or 1,000 mg per day, so amounts like 100 to 250 mg fall short of what researchers tested.
What dose do SOMA HEALTH gummies provide?
1,000 mg of urolithin A per 4-gummy daily serving — the top of the clinically studied range — sugar-free, third-party tested, 120 gummies per 30-day supply.
Should I start low and increase?
Some people prefer to begin at 500 mg, the lower boundary of the studied range. There is no single correct path; consistency over several months matters more than the exact number. If you have a health condition, ask your doctor before choosing.
Does a higher dose work faster?
The human trials measured muscle-related outcomes at roughly four months regardless of arm. Urolithin A supports a slow, cumulative cellular process, so a higher dose is not a shortcut on timing.
Is urolithin A a treatment for any condition?
No. It supports normal cellular and muscle function and is not intended to diagnose, treat, or prevent disease. Speak with your doctor about medical concerns.
*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.
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