La urolitina A es un compuesto que tus bacterias intestinales producen a partir de los elagitaninos de la granada, las nueces y las bayas. A diferencia de la mayoría de los compuestos de longevidad, ha llegado a ensayos publicados en humanos. Su acción central es activar la mitofagia: la limpieza celular que recicla las mitocondrias dañadas. Pequeños ensayos aleatorizados en adultos de mediana edad y mayores muestran ganancias modestas en fuerza muscular y resistencia, junto con marcadores mitocondriales más saludables. Las ganancias tienen límites claros.
Los dos ensayos más grandes no alcanzaron su objetivo principal preregistrado; los beneficios aparecieron en medidas secundarias. Casi todos los ensayos fueron financiados por la empresa que vende el suplemento, y solo una minoría de las personas convierte los alimentos en mucha urolitina A. Es segura a corto plazo y modifica de forma fiable los biomarcadores. Ningún ensayo en humanos ha demostrado que ralentice el envejecimiento o prolongue la vida.
Findings & Outcomes
What It Is
Your gut bacteria build urolithin A; no food contains it ready-made. Bacteria in the large intestine break the ellagitannins in pomegranate, walnuts, strawberries, raspberries and some other fruits into ellagic acid, then into urolithins. Of the urolithins, researchers focus on urolithin A.
From Food to Urolithin A
1The precursors in food
The raw material is a group of compounds called ellagitannins, concentrated in pomegranate, walnuts, and berries such as strawberries and raspberries. On their own these are poorly absorbed. Eating those foods gives your gut the raw ellagitannins, and the bacteria do the rest.
2The gut bacteria make the conversion
Bacteria in the large intestine convert ellagitannins into ellagic acid and then into urolithins, including urolithin A. This is a microbial step, so it depends on which bacteria you carry. It is the same reason two people can eat the same pomegranate and end up with very different amounts.
3Converter and low-producer microbiomes
Researchers group people into urolithin metabotypes. Many produce urolithin A well, while a minority produce very little. Which group you fall into shifts with age, diet and gut health. A low producer gets less benefit from the food precursors, which is the reason the compound is also made as a direct supplement.
What It Does
Its clearest human signal is in muscle. In middle-aged adults, strength rose about 12%; in adults aged 65 to 90, endurance improved.
Both of the largest human trials missed their pre-registered primary endpoint; the strength and endurance gains came on secondary measures instead.
One missed on peak power output; the other on 6-minute walk distance and muscle ATP production.
In people, urolithin A reliably shifts muscle mitochondrial genes and blood markers toward healthier mitochondria. The markers moved; whether people actually got stronger is the weaker part of the record.
Reaching published, randomized human trials is unusual in the biology of aging, and urolithin A has cleared that bar. The human evidence is still early, but the animal mechanism is strong enough to make better human research worth watching.
The Research & Studies
Everything here is based on the research we have collected and checked, sorted into groups and ordered with the strongest evidence first. Click any claim to open the studies behind it.
How it works
La urolitina A activa la mitofagia, la limpieza celular de las mitocondrias dañadas
En animales de laboratorio, la urolitina A activa la limpieza celular que elimina las mitocondrias dañadas, y eso se acompañó de una vida más larga en gusanos y un mejor estado muscular en ratones viejos.
Ryu y sus colegas (2016, Nature Medicine) mostraron que la urolitina A induce la mitofagia en distintos sistemas modelo: prolongó la vida en C. elegans y mejoró la resistencia en carrera y la fuerza de agarre en roedores envejecidos, con el efecto atribuido a una mayor eliminación de mitocondrias disfuncionales. El caso molecular a favor de la mitofagia es la parte más sólida de la historia de la urolitina A, y por eso el compuesto se llevó a ensayos en humanos.
The study · 1
Ryu 2016, Nature Medicine · Nature Medicine
Counts once: this finding and 1 other here come from the same source, so they are one body of evidence, not separate confirmations.
Tus bacterias intestinales fabrican urolitina A a partir de los alimentos, y no todo el mundo produce mucha
No comes la urolitina A en sí; tus bacterias intestinales la fabrican a partir de la granada, las nueces y las bayas, y no todo el mundo tiene las bacterias necesarias para producir mucha.
Tomás-Barberán y sus colaboradores (2017, Molecular Nutrition and Food Research) plantearon el concepto de metabotipo de urolitinas: tras comer alimentos ricos en elagitaninos, los individuos se agrupan en el metabotipo A (que produce urolitina A), el metabotipo B (que además produce isourolitina A y urolitina B) y el metabotipo 0 (que produce poca o ninguna). El grupo en el que cae una persona depende de la composición de su microbiota intestinal y varía con la edad, la dieta y la salud, lo cual es la razón principal para suplementar el metabolito directamente.
The study · 1
Tomas-Barberan 2017, Mol Nutr Food Res · Molecular Nutrition and Food Research
500 mg y 1,000 mg modificaron los genes mitocondriales musculares y los marcadores en sangre en 4 semanas
En el primer estudio en humanos, la urolitina A cambió la actividad génica muscular y los marcadores en sangre de una forma que apunta hacia mitocondrias más sanas.
Andreux y sus colegas (2019, Nature Metabolism) llevaron a cabo el primer ensayo en humanos de urolitina A en adultos mayores sanos y sedentarios, con administraciones únicas y repetidas a lo largo de cuatro semanas. La urolitina A fue biodisponible en todas las dosis, y 500 mg y 1,000 mg modularon las acilcarnitinas plasmáticas y la expresión génica mitocondrial del músculo esquelético, lo que los autores interpretaron como una firma molecular de una función mitocondrial mejorada. Estos fueron resultados secundarios; el resultado principal fue la seguridad.
The study · 1
Andreux 2019, Nature Metabolism · Nature Metabolism
Muscle And Strength
Más contracciones musculares antes de la fatiga en adultos de 65 a 90 años
Las personas mayores que tomaron urolitina A pudieron realizar más contracciones musculares antes de fatigarse, aunque las medidas principales del ensayo, la distancia caminada y una lectura directa de energía muscular, no mejoraron claramente.
Liu y sus colegas (2022, JAMA Network Open) aleatorizaron a 66 adultos de 65 a 90 años (alrededor del 76% mujeres, todas de raza blanca) a 1,000 mg de urolitina A o placebo al día durante cuatro meses. La resistencia muscular, medida como las contracciones hasta la fatiga en el primer interóseo dorsal y el tibial anterior, mejoró de forma significativa frente a placebo a los dos meses. Los dos criterios de valoración principales, el cambio en la distancia recorrida en 6 minutos caminando y la producción máxima de ATP en el músculo de la mano, no alcanzaron significación estadística, aunque ambos mostraron una tendencia favorable a la urolitina A.
The study · 1
Liu 2022, JAMA Netw Open · JAMA Network Open
Counts once: this finding and 1 other here come from the same source, so they are one body of evidence, not separate confirmations.
La fuerza muscular aumentó alrededor de un 12% en adultos de mediana edad a lo largo de cuatro meses
Los adultos de mediana edad que tomaron urolitina A durante cuatro meses ganaron aproximadamente un 12% más de fuerza, aunque el ensayo no alcanzó su objetivo principal preestablecido de potencia máxima.
Singh y sus colegas (2022, Cell Reports Medicine) llevaron a cabo un ensayo aleatorizado controlado con placebo de urolitina A (comercializada como Mitopure) en dos dosis durante cuatro meses en adultos de mediana edad (NCT03464500). La fuerza muscular aumentó alrededor de un 12%, y la expresión en el músculo esquelético de proteínas relacionadas con la mitofagia y el metabolismo mitocondrial aumentó de forma significativa. El criterio de valoración principal preespecificado, la potencia máxima, no mejoró de forma significativa, así que el resultado de fuerza se sitúa entre los resultados secundarios.
The study · 1
Singh 2022, Cell Rep Med · Cell Reports Medicine
Counts once: this finding and 1 other here come from the same source, so they are one body of evidence, not separate confirmations.
Cardiorespiratory Fitness
Mejor resistencia aeróbica y distancia caminada en 6 minutos en el mismo ensayo de mediana edad
En el mismo ensayo de mediana edad se observó una mejor resistencia aeróbica y una mayor distancia caminada con la urolitina A.
Junto con el resultado de fuerza, Singh y sus colegas (2022, Cell Reports Medicine) reportaron mejoras clínicamente relevantes en la resistencia aeróbica (VO2 máximo) y en el rendimiento físico (prueba de 6 minutos caminando) con urolitina A frente a placebo a lo largo de cuatro meses. Al igual que con el hallazgo de fuerza, se trató de resultados secundarios en un ensayo cuyo criterio de valoración principal preespecificado de potencia máxima no se alcanzó.
The study · 1
Singh 2022, Cell Rep Med · Cell Reports Medicine
Counts once: this finding and 1 other here come from the same source, so they are one body of evidence, not separate confirmations.
Immune Function
La urolitina A redujo la proteína C-reactiva, un marcador sanguíneo de inflamación
La urolitina A redujo ligeramente un marcador sanguíneo habitual de inflamación.
En Liu y sus colegas (2022, JAMA Network Open), la proteína C-reactiva plasmática, varias acilcarnitinas y ceramidas se redujeron con urolitina A en relación con placebo a lo largo de cuatro meses. Unas acilcarnitinas más bajas se interpretan como una oxidación de grasa más completa, y una proteína C-reactiva más baja como una menor inflamación sistémica, ambas apuntando en la misma dirección que los hallazgos musculares.
The study · 1
Liu 2022, JAMA Netw Open · JAMA Network Open
Counts once: this finding and 1 other here come from the same source, so they are one body of evidence, not separate confirmations.
Longevity And Mortality
Ningún estudio en humanos ha demostrado que la urolitina A ralentice el envejecimiento o alargue la vida
Las afirmaciones sobre una vida más larga provienen de gusanos y ratones; ningún estudio en humanos ha demostrado que la urolitina A ralentice el envejecimiento o alargue la vida.
La evidencia de longevidad es animal: Ryu y sus colaboradores (2016, Nature Medicine) informaron una vida más larga en C. elegans y una mejora muscular en roedores envejecidos. Los ensayos en humanos hasta la fecha llegan a medidas de fuerza y resistencia muscular y biomarcadores mitocondriales a lo largo de semanas o meses. Ningún estudio en humanos ha usado la longevidad, la incidencia de enfermedades o un criterio de valoración de envejecimiento validado, por lo que el beneficio antienvejecimiento en personas es una extrapolación a partir del mecanismo y del trabajo animal.
The study · 1
Ryu 2016, Nature Medicine · Nature Medicine
Counts once: this finding and 1 other here come from the same source, so they are one body of evidence, not separate confirmations.
Cognition
Los beneficios cerebrales aparecen en estudios animales y celulares, todavía no en personas
Los estudios en animales y células apuntan a posibles beneficios cerebrales, pero ningún ensayo en humanos ha demostrado que la urolitina A ayude a la memoria o al pensamiento.
Garcia-Villalba y sus colaboradores (2023, Molecular Aspects of Medicine) revisan los elagitaninos, las urolitinas y la neuroprotección, describiendo mecanismos preclínicos que incluyen una mitofagia potenciada y una menor neuroinflamación, y discutiendo el posible vínculo con el microbioma intestinal. La evidencia humana sobre resultados cognitivos específicos de la urolitina A sigue en una etapa temprana, por lo que esto se sitúa en el extremo preliminar de la escala.
The study · 1
Garcia-Villalba 2023, Mol Aspects Med · Molecular Aspects of Medicine
How It Works
Mitophagy is the cell's quality-control step: it tags a spent mitochondrion and recycles it, freeing room for a healthy replacement. It is one branch of autophagy, aimed only at mitochondria, and urolithin A raises its rate.
The animal evidence is the sturdiest part of the case. In worms and rodents, urolithin A induced mitophagy and improved muscle function in aged animals; in the worm C. elegans, it extended lifespan.
Muscle is dense with mitochondria, and its capacity tracks their quality. Clearing damaged mitochondria leaves older muscle with a healthier population. That predicts better endurance and strength where cleanup has slowed. The two largest trials set out to test that prediction in people.
Getting It Right
Urolithin A reaches you two ways: the food precursors your gut converts, or the direct supplement.
Ways to Do It
Urolithin A can come from food precursors, from the direct supplement, or both. The right approach depends partly on whether your gut makes much of it. Keep your expectations matched to what the trials showed.
Pomegranate, walnuts, strawberries and raspberries supply the ellagitannins your gut turns into urolithins. These are good foods on their own merits, and for a person who converts well they provide a steady, free source. This is the first and most sensible step, and it brings fiber and other nutrients along with it.
Many people make urolithin A well from those foods, and a minority make very little. There is no simple home test, and the amount shifts with age, diet and gut health. If you eat plenty of pomegranate and walnuts and feel no different, low conversion is one plausible reason, and it is the situation the direct supplement was designed for.
The human trials used direct urolithin A, sold as Mitopure, which sidesteps the conversion step. The doses studied were 500 mg and 1,000 mg a day, taken for four weeks to four months.
The benefits were measured in middle-aged and older adults focused on muscle and endurance, many of them already reasonably active. If that describes you, the muscle and endurance signals are the part of the evidence that applies. The trials did not study young, healthy people who already convert food well.
The trials support modest gains in muscle strength and endurance, plus healthier mitochondrial markers, over months. They do not reach a longevity result; that rests on animal data. Treat it as a possible edge on muscle and energy, and keep training as the lever with the strongest evidence for the same goals.
Go Deeper
Related topics:
- Mitochondria and energy, the organelles the cleanup targets.
- The biology of aging, how mitochondrial quality fits the wider process.
- Protein and muscle, the raw material muscle is built from.
- Resistance training, the direct way to build strength.
The Chinese Medicine View
Urolithin A was described only this century, so the classical pharmacopoeia never assigned it a channel, a temperature or a flavour, and it has no traditional preparation. The tradition can still offer a lens, and two of its ideas map onto what the compound does.
Chinese medicine treats stagnation, the buildup of what the body should have cleared, as a root of many disease patterns. Mitophagy is the cellular version of that idea.
The tradition also ties aging to the Kidney and its store of Jing, the deep constitutional reserve drawn down across a lifetime. Classical signs of declining Jing (waning vitality, weakening bones, lost strength) track closely with what a modern account calls aging. A substance tied to cellular renewal and muscular vigor maps naturally onto Kidney and Jing.
A practitioner would not treat urolithin A as a classical tonic. The framework does not hold that more of a supporting substance is better. It would read the whole-food route (pomegranate, walnuts and berries in a varied diet) as squarely in keeping with nourishing life. The compound draws no authority from the tradition; its evidence stands on the trials.
Five limits temper the muscle findings.
Cautions For This Practice
Extra restraintEverything to be aware of is here, in one place. This practice suits most healthy people; a few situations call for real care.
No más efectos secundarios que con placebo con hasta 1,000 mg al día durante 4 meses
La seguridad fue el resultado principal preestablecido del primer ensayo en humanos (Andreux 2019, Nature Metabolism), donde se encontró que la urolitina A era segura y biodisponible en dosis de hasta 1,000 mg. En el ensayo de 4 meses en adultos mayores (Liu 2022, JAMA Network Open), no se observó diferencia estadística en eventos adversos entre la urolitina A y el placebo, y el compuesto se describió como seguro y bien tolerado. Ambos fueron ensayos cortos en grupos pequeños.Andreux 2019, Nature MetabolismLiu 2022, JAMA Netw Open
Early and often industry-funded evidence
The human trials to date are small, and several were run or co-authored by the maker of Mitopure. That does not make the findings wrong. Small sponsored trials are where effects tend to look largest, so treat the muscle numbers as early rather than settled.
Long-term use has not been studied
The trials ran for weeks to a few months. Urolithin A was well tolerated over those periods; what happens with daily use over years has not been measured.
Pregnancy and breastfeeding are untested
There is no trial data on urolithin A supplements during pregnancy or breastfeeding. Getting its food precursors is part of a normal diet; a concentrated supplement during these periods is a question for your clinician.
It is not a longevity guarantee
In people, urolithin A has shown no effect on aging or lifespan. Any anti-aging promise on a label runs past what the human trials have measured.
Medication and condition interactions are not characterized
Formal interaction studies with common medications are lacking. If you take prescription drugs or manage a chronic condition, a word with your pharmacist or clinician before adding a concentrated supplement is sensible.
Start slow, be smart, read the research, and consult a professional if you have any concerns. This is here to inform your choice, not make it for you.
Common Questions
How is urolithin A different from taking pomegranate extract?
Pomegranate extract gives you ellagitannins and ellagic acid, the precursor. Your gut still has to convert that into urolithin A, and a minority of people do so poorly. Direct urolithin A, the Mitopure form used in the trials, is the finished compound, so it skips the conversion step.
Does urolithin A build muscle?
Modestly. Trials found small gains in strength and endurance. If muscle is the aim, resistance training and enough protein are what actually build it, and urolithin A is at most a small addition.
Can I get urolithin A from food like pomegranate?
Yes, if your gut converts it. The food gives your bacteria the raw material. How much becomes urolithin A depends on the bacteria you carry, and a minority produce very little. There is no simple home test.
Is urolithin A safe?
Over the short term, yes. Safety was the main goal of the first human study, which found the compound well tolerated. A four-month trial in older adults saw no more side effects than placebo at up to 1,000 mg a day. The open questions are long-term use and pregnancy, both untested.
Does urolithin A slow aging or extend life?
No, the lifespan gains are in worms and rodents. Those results make urolithin A worth testing further in people, but the marketing runs well ahead of the human evidence.
Explore Related
Other pages this one connects to, by the evidence they share, the outcomes they touch, and the ground they cover.
All 11 sources on this page independently checked and cross-referenced.
Thomas Dehli, Founder & Editor, Sacred Lotus
Sacred Lotus has published Chinese medicine reference material since 2001. Integrative pages are held to the same standard as the herb and formula library: cite the source, grade the claim at its real strength, and say where the research has not looked. This page is educational and it is not medical advice. Last reviewed and updated August 9, 2026.
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