Urolithin A: Benefits, Dosage & How It Works (Complete Guide)

Urolithin A is one of the most studied longevity ingredients of the past decade — a compound your body can make from the foods you eat, shown in human research to support your mitochondria, cellular energy, and muscle strength. This guide explains what it is, how it works, how much to take, and how to get it.

What is urolithin A?

Urolithin A is a compound produced in your gut when your microbiome breaks down ellagitannins — natural molecules found in pomegranates, berries, and walnuts. It isn't in those foods directly; your gut bacteria create it from them. The catch is that only some people carry the right gut bacteria to produce meaningful amounts, which is why many people turn to a supplement that delivers urolithin A directly. It is a clinically studied ingredient, meaning the compound itself has been tested in peer-reviewed human trials.

How urolithin A works: mitophagy and your mitochondria

Your cells are powered by mitochondria — tiny structures that produce energy. Over time, some mitochondria become damaged and less efficient. Your body clears these out through a natural recycling process called mitophagy. As we age, mitophagy slows down, and worn-out mitochondria accumulate.

Urolithin A has been shown to support mitophagy — helping the body clear damaged mitochondria and make room for healthy ones. Because strong, efficient mitochondria underpin energy, endurance, and muscle function, supporting this cellular housekeeping is the reason urolithin A has drawn so much research interest for healthy aging. Learn more about what mitophagy is, autophagy, and the bigger picture of mitochondrial health.

The benefits of urolithin A

Muscle strength and endurance

Human clinical trials are where urolithin A has drawn the most attention, with research reporting support for muscle endurance and muscle strength over sustained daily use. This is why it appeals to people focused on staying strong and mobile as they age, as well as active adults and athletes. See urolithin A for muscle and VO2 max & endurance.

Cellular energy

By supporting healthier mitochondria, urolithin A supports the cellular energy production your body relies on every day. This is a foundational, whole-body benefit rather than a stimulant-style jolt — more on urolithin A for energy.

Healthy aging

The broader promise of urolithin A is healthy aging — helping preserve the strength, energy, and physical capability that matter over the long term. It supports the body at the cellular level rather than targeting any single symptom. For a fuller breakdown, see our urolithin A benefits guide.

How much urolithin A should you take?

Clinical research has used 500 mg to 1,000 mg of urolithin A per day. At 500 mg, studies observed support for muscle and mitochondrial markers; the 1,000 mg dose was associated with even greater mitochondrial gene expression. The most important rule when choosing a product is to reach a dose within this studied range — many cheaper products fall well short. See our full urolithin A dosage and timing guide, how to take it, and how long it takes to work.

Where to get urolithin A: foods vs supplements

Pomegranates, walnuts, and berries provide the precursors your gut can convert into urolithin A — but conversion varies enormously from person to person, and you would need to eat impractical amounts to approach a studied dose. That is why a standardized supplement is the reliable route. See foods high in urolithin A, the pomegranate connection, and whether you're a producer.

Is urolithin A safe?

Urolithin A has been well tolerated in human studies, with side effects uncommon and generally mild. As with any supplement, it is sensible to check with your doctor first if you are pregnant, nursing, or taking medication. Our side effects and safety guide covers this in depth.

How to choose a urolithin A supplement

Four things matter: a dose in the clinically studied 500-1,000 mg range, third-party testing so you know the label is accurate, no unnecessary sugar, and a format you will take consistently. See our full checklist, compare gummies vs capsules, and see the best urolithin A gummies.

Explore urolithin A in depth

Frequently asked questions

*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.