Urolithin A Benefits for Muscle Strength and Longevity

Does urolithin A cause side effects?

In multiple clinical trials, researchers did not find serious side effects caused by UA.

Can urolithin A replace exercise for muscle health?

No, while UA can boost your muscle performance even if you are sedentary, it works best when combined with a healthy, active lifestyle.

How long does it take to see results from urolithin A?

While cellular changes begin quickly, most human studies show that it takes about 2 to 4 months of daily use to see significant improvements in muscle strength and endurance.

Does everyone produce urolithin A naturally?

No, only about 40% of people have the specific gut microbes needed to convert food precursors into UA.

Key takeaways

• Urolithin A (UA) is a postbiotic made by gut bacteria after you eat foods like pomegranates, walnuts, and berries.
• Urolithin A works by triggering mitophagy, a cellular cleanup process that removes damaged mitochondria and builds fresh ones.
• Urolithin A also comes as a supplement. Taking 1000 milligrams (mg) of UA daily for 2 to 4 months may improve leg muscle strength and boost endurance in some people.

As we get older, our bodies start to slow down. One of the biggest challenges of aging is the loss of muscle strength and a decline in how well our immune system works.

Scientists are constantly looking for ways to not just help people live longer, but to help them stay healthy and active during those extra years. This concept is known as healthspan.

Urolithin A (UA) is a substance that could contribute to healthier aging. This article will explain what this compound is, how it works inside your cells to boost energy, and whether it can actually help you stay stronger for longer.

UA is a “postbiotic”. It’s a substance created in your gut after you eat certain whole foods, like pomegranates, walnuts, strawberries, and raspberries. These foods contain natural compounds called ellagitannins. When you eat them, the bacteria in your gut break them down into urolithin A.

However, not everyone can make UA naturally. Studies show that only about 40% of adults have the specific “good” gut bacteria needed to produce it. And even if you can make it, your body’s ability to produce UA usually decreases as you get older.

Because of this, many researchers are now focusing on urolithin A supplements to make sure people get enough of it to see real health benefits.

UA works by fixing your cells’ energy centers, called mitochondria. As you age, these “powerhouses” become worn out and inefficient.

Urolithin A triggers mitophagy, a cellular recycling program that identifies and removes these damaged parts. This cleanup allows the body to build fresh, healthy mitochondria, leading to stronger muscles and a rejuvenated immune system. This is why urolithin A is often associated with longevity or healthy aging.

UA may have benefits for healthy aging and improving muscle strength.

Urolithin A and healthy aging

It’s difficult to run longevity studies on humans due to our long lifespans. However, in animal studies, researchers have found the following evidence that UA could contribute to healthier aging:

• In a type of worm called C. elegans, UA extended life span by 45%.
• In middle-aged mice, it increased life span by almost 19%.

In humans, the focus is on fighting the hallmarks of aging, such as chronic inflammation or “inflammaging“. By reducing inflammation and cleaning up cellular waste, urolithin A may help prevent many of the diseases that shorten our lives.

UA has also been shown to help the immune system by increasing the number of fresh, active immune cells (like T-cells) that fight off infections and even cancer.

Urolithin A and muscle strength

Muscle health is one of the most well-studied areas in UA research. As we get older, we lose muscle mass and strength, which makes it harder to stay active. UA helps fight this decline in several ways:

• Increased strength and physical performance: A 2022 study found that middle-aged adults improved their leg muscle strength (specifically in the hamstrings) by about 12% after taking UA for 4 months. They also performed better in a 6-minute walk test, meaning they could walk further and faster.
• Better endurance: In another 2022 study of older adults, those taking 1000 milligrams (mg) of UA daily significantly improved their muscle endurance. They were able to perform many more muscle contractions in their hands and legs before getting tired compared to those taking a placebo.

Studies of UA in humans show that it is generally safe and well tolerated. It has good bioavailability, meaning your body can absorb it into your bloodstream and send it to your muscles and other tissues where it is needed.

The liver processes urolithin A and clears it from the body within 3 to 4 days.

Clinical trials have tested doses ranging from 250 mg to 1000 mg per day. While 500 mg can help with certain health markers, the 1000 mg daily dose is most often associated with significant improvements in muscle strength, endurance, and reduced inflammation.

Researchers often recommend taking it in the morning on an empty stomach for optimal absorption.

You can try to boost your UA levels by eating foods rich in ellagitannins, like pomegranates, walnuts, and berries. However, simply drinking pomegranate juice might not be enough for most people.

One 2022 study showed that taking a 500 mg supplement of urolithin A resulted in 6 times higher blood UA levels than drinking a glass of pomegranate juice. Supplementation is more reliable because it doesn’t depend on having the right gut bacteria to do the work.

In multiple clinical trials, researchers did not find serious side effects caused by UA.

No, while UA can boost your muscle performance even if you are sedentary, it works best when combined with a healthy, active lifestyle.

While cellular changes begin quickly, most human studies show that it takes about 2 to 4 months of daily use to see significant improvements in muscle strength and endurance.

No, only about 40% of people have the specific gut microbes needed to convert food precursors into UA.

Next Steps

If you’re looking to improve your healthspan, try the following:

• Stay consistent: If you decide to try a urolithin A supplement, stick with it for at least 4 months to judge the results.
• Check your diet: Include pomegranates, walnuts, and berries into your diet.
• Consider a supplement: Look into high quality, pure UA supplements (500 mg-1000 mg) from a manufacturer who follows current good manufacturing processes (cGMP).
• Talk to a professional: Before trying UA, consult a doctor if you have underlying health conditions.

Read more: How to choose safe and effective supplements

Urolithin A improves cellular energy by triggering a biological “cleanup” process that helps with cell rejuvenation.

Taking a daily UA supplement may help boost muscle strength and endurance when combined with regular exercise and other healthy lifestyle choices.

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