How Much Urolithin A for Muscle Strength: A Simple Daily Target
If your goal is stronger muscles, the dosing question has a clean answer. The human trials on urolithin A and muscle strength used a specific daily amount over several months, and the target maps neatly onto a single serving. Here is how much to take, what the research genuinely shows, and what to realistically expect.
Why muscle strength and mitochondria are linked
Strength depends on healthy, well-fueled muscle fibers, and those fibers are packed with mitochondria that supply the energy for contraction and recovery. Research on aging muscle shows that mitochondrial oxidative capacity tends to decline over the years, and reduced mitochondrial quality is a recognized feature of age-related strength and muscle loss. Keeping the mitochondrial network in good repair is therefore one plausible lever for supporting the muscle that strength is built on.
Urolithin A is studied precisely for that repair side. It is a gut postbiotic your microbiome makes from ellagitannins in pomegranate, walnuts, and some berries. Only some people convert those precursors efficiently, so food is an unreliable way to reach useful levels. Urolithin A supports mitophagy, the recycling of worn-out mitochondria so healthier ones replace them. That housekeeping mechanism is why researchers tested it against real muscle outcomes rather than only lab markers.
The strongest human evidence on muscle
The clearest human result for strength comes from Singh and colleagues 2022 in Cell Reports Medicine. This four-month randomized trial in middle-aged adults compared 500 mg and 1,000 mg daily arms and reported improvements in muscle strength and exercise performance. Because it measured strength directly, over months, at defined doses, it is the study that most directly answers how much to take for this goal.
Alongside it, Liu and D'Amico 2022 in JAMA Network Open studied older adults for roughly four months and reported improved muscle endurance, meaning muscles could sustain more contractions before fatiguing. And the first-in-human study, Andreux and colleagues 2019 in Nature Metabolism, established that urolithin A was safe and well tolerated at up to 1,000 mg per day and produced a mitochondrial gene-expression signature in muscle, confirming the compound reaches and engages the tissue in question.
Newer human research
More recent trials have widened the population studied. A 2024 eight-week randomized trial in the Journal of the International Society of Sports Nutrition looked at resistance-trained men, an audience already actively building strength, rather than only older or sedentary adults. A 2025 trial examined distance runners, and a 2025 Nature Aging randomized study of about 28 days reported support for the mitochondrial health of immune cells in midlife adults. These are meaningful additions, but several are short or modest in size. A 2024 systematic review in Ageing Research Reviews concluded that the human evidence for targeting aging with urolithin A is still emerging. We state that clearly: the strength signal is consistent and the mechanism is well understood, but the field is still developing.
The preclinical foundation (label: animal and cell research)
The muscle story began in preclinical models, which should be read as hypothesis-generating rather than proof of a human benefit. Ryu and colleagues 2016 in Nature Medicine showed urolithin A induced mitophagy, extended lifespan in the roundworm C. elegans, and improved muscle function in rodents. Separately, D'Amico and colleagues 2022 in Aging Cell explored joint and cartilage outcomes in osteoarthritis models, relevant to how well muscle and joints work together, but again in animals. These findings motivated the human trials; they are not a substitute for them.
How much urolithin A for muscle strength, in practice
The practical target is 1,000 mg per day, taken consistently. Two expectations keep this realistic. First, timeline: the strength trials ran about four months, so give it that kind of runway rather than judging it in a week. Second, mechanism: urolithin A is not a stimulant or an anabolic agent, so it will not spike your one-rep max overnight. It supports the mitochondrial upkeep that healthy muscle depends on, which is complementary to, not a replacement for, resistance training. Progressive strength work remains the primary driver of getting stronger; the supplement supports the cellular environment those gains are built in.
For related detail, see our page on urolithin A for muscle, our full urolithin A dosage guide, and our overview of how long urolithin A takes to work. For the complete background, begin with the urolithin A guide, and to compare formats and brands, see our roundup of the best urolithin A gummies.
Unexplained muscle weakness can be a sign of an underlying medical issue, from vitamin deficiencies to neurological or endocrine conditions. Urolithin A is a structure/function supplement that supports muscle and mitochondrial health; it is not a treatment for weakness or any medical condition. If you are experiencing noticeable or sudden loss of strength, see your doctor rather than relying on a supplement alone.
Frequently asked questions
How much urolithin A should I take for muscle strength?
The human strength trials used up to 1,000 mg per day. That is the target for this goal, and it matches one 4-gummy serving of SOMA HEALTH Urolithin A Gummies.
How long until I might see a difference?
The strength and endurance trials ran roughly four months. Plan for that kind of consistent timeline rather than expecting results in days.
Does urolithin A build muscle on its own?
No. It is not an anabolic agent or stimulant. It supports the mitochondrial upkeep muscle relies on and is complementary to resistance training, which remains the primary driver of strength.
Is 500 mg or 1,000 mg better?
The Singh 2022 trial tested both arms. For muscle strength goals, 1,000 mg is the top of the studied range, which is what one daily serving of SOMA HEALTH Urolithin A Gummies delivers.
Can I get enough from food instead?
Pomegranate, walnuts, and berries provide the precursors, but only some microbiomes convert them into urolithin A efficiently, and rarely to trial-level amounts. A standardized dose removes that variability.
Is 1,000 mg a day safe?
The first-in-human study reported urolithin A was safe and well tolerated at up to 1,000 mg daily. As always, check with your healthcare provider, especially if you are pregnant, nursing, or on medication.
*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 →