Urolithin A vs Beetroot and Nitric Oxide Boosters: Blood Flow vs Cell Power
Beetroot and nitric-oxide boosters work on the plumbing: they help widen blood vessels so more oxygen-rich blood reaches working muscle. SOMA HEALTH Urolithin A works one step deeper, on what the muscle cell does with that oxygen once it arrives. They answer two different questions, and understanding the difference makes it easier to choose, or to use both on purpose.
Two different jobs: delivery versus use
Think of a working muscle as a factory. Beetroot and other nitric-oxide products are about the roads leading to the factory: wider roads mean more raw material arrives per minute. Urolithin A is about the machines inside the factory, the mitochondria, that actually turn that raw material into usable energy. A factory can have perfect roads and still underperform if its machines are worn out, and it can have excellent machines that sit idle if the roads are blocked. Blood flow and cellular energy production are complementary, not interchangeable.
This is why comparing them as rivals can be misleading. They are not two versions of the same thing. One supports the supply chain; the other supports the internal workhorses. Below is what the evidence actually shows for each, kept honest about which findings come from human trials and which are still early.
How beetroot and nitric-oxide boosters work
Beetroot is rich in dietary nitrate. In the body, nitrate is converted, with help from bacteria in the mouth, into nitrite and then into nitric oxide, a signaling molecule that relaxes the smooth muscle lining blood vessels. That relaxation, called vasodilation, widens vessels and can improve blood flow and lower the oxygen cost of a given effort. Human research on dietary nitrate is relatively mature: it has been studied for exercise economy, endurance performance in some settings, and short-term blood pressure. Effects tend to be most noticeable in recreational athletes and can be smaller or inconsistent in highly trained ones.
Nitrate-based products are typically timed a couple of hours before activity, because nitric oxide availability rises and then fades within hours. In other words, beetroot is an acute, same-session tool. You take it, you train, and the vascular effect is spent. It does not remodel the muscle cell itself; it changes the environment around it for that session.
How SOMA HEALTH Urolithin A works
Urolithin A is not a stimulant and not a vasodilator. It is a gut postbiotic: when you eat ellagitannins from pomegranate, walnuts, and certain berries, some people's gut bacteria convert those compounds into urolithin A. Only some microbiomes make it efficiently, which is one reason a consistent oral dose is useful, it does not depend on whether your gut happens to be a good converter.
Its main proposed role is supporting mitophagy, the cell's housekeeping process for identifying worn-out mitochondria and recycling them so healthier ones can take their place. Mitochondria are where oxygen and fuel are converted into ATP, the energy currency of the cell. The idea is not to push more blood into a muscle for an afternoon; it is to support the quality and turnover of the energy machinery over weeks.
Here is where honesty matters. The foundational mitophagy and lifespan work, Ryu and colleagues in Nature Medicine (2016), was preclinical, done in C. elegans and rodents. That work is promising but should not be read as proof of the same effect in people. What has been shown in humans is more measured. Andreux and colleagues (Nature Metabolism, 2019) ran the first-in-human study and reported that urolithin A was safe and well tolerated at doses up to 1,000 mg per day, and that it shifted a mitochondrial gene-expression signature in a favorable direction.
From there, the human muscle picture built gradually. Singh and colleagues (Cell Reports Medicine, 2022) studied middle-aged adults over four months with 500 mg and 1,000 mg arms and reported improvements in muscle strength and aspects of exercise performance. Liu, D'Amico and colleagues (JAMA Network Open, 2022) studied older adults over roughly four months and reported gains in muscle endurance. A 2024 randomized trial in the Journal of the International Society of Sports Nutrition looked at resistance-trained men over eight weeks, and a 2025 trial examined distance runners. A 2025 Nature Aging randomized trial over about 28 days reported support for immune-cell mitochondrial health in midlife adults, relevant to age-related low-grade inflammation. A 2024 systematic review in Ageing Research Reviews sums the field up fairly: the human evidence is real but still emerging.
Timing, dose, and what to expect
The two also differ in tempo. Beetroot is acute and pre-workout: you feel its window within hours and it fades. Urolithin A is cumulative. In the human trials, meaningful muscle outcomes were measured over roughly four months of daily use, not after a single dose. That difference in timeline is not a weakness of either, it is simply what each is for. You would not judge a vasodilator by a four-month endpoint, and you should not expect urolithin A to do anything for this afternoon's session.
On dose: urolithin A has been studied at 500 to 1,000 mg per day, with 1,000 mg at the top of that range. SOMA HEALTH Urolithin A Gummies provide 1,000 mg across a four-gummy daily serving. Dietary nitrate dosing is usually expressed in millimoles of nitrate rather than milligrams of beetroot, and it varies widely by product, so with any nitric-oxide booster, check the current label for its actual nitrate content.
A note on expectations, since these are muscle, energy, and exercise topics: neither beetroot nor urolithin A is a treatment for any medical condition, and neither should be used to manage cardiovascular disease, low energy from an underlying illness, or a muscle disorder. These are structure/function supplements. If you have a health condition, are on blood-pressure medication (relevant with nitrates), or have persistent fatigue or weakness, talk with your doctor before adding either.
Can you use both?
Yes, and conceptually they stack well because they act on different layers. Beetroot may support blood flow and oxygen delivery for a given session; urolithin A aims to support the mitochondrial machinery that turns that delivered oxygen into energy over time. One is a same-day lever, the other is a slow investment. For readers deciding where to start, our roundup of the best urolithin A gummies covers what to look for, and if muscle is your specific priority, see urolithin A for muscle. To understand the underlying biology, mitochondrial health and what is mitophagy go deeper.
For full transparency: SOMA HEALTH makes a urolithin A product, so we are not a neutral party in this comparison. We have tried to keep the claims above tied to what the studies actually report and to label preclinical work as preclinical.
Frequently asked questions
Is beetroot or urolithin A better for muscle?
They do different things, so neither is simply better. Beetroot supports nitric-oxide blood flow and oxygen delivery for a session, and human research on dietary nitrate is well established for exercise economy. Urolithin A supports the muscle cell's mitochondria over time, with human trials reporting strength and endurance benefits across roughly four months. For lasting muscle output, urolithin A targets the mechanism; for an acute pre-workout effect, beetroot does.
Do beetroot and SOMA HEALTH Urolithin A do the same thing?
No. Beetroot is about delivery, widening vessels so more oxygen-rich blood reaches muscle. Urolithin A is about use, supporting the mitochondria that convert that oxygen into energy. They act on different layers and can be used together.
How long until urolithin A works?
In human trials, muscle outcomes were measured over about four months of daily use. It is a cumulative supplement, not a same-session one. Beetroot, by contrast, acts within hours and fades the same day. For more, see how long urolithin A takes to work in our guide.
What dose of urolithin A is studied?
Human studies used 500 to 1,000 mg per day, with 1,000 mg at the top of the range and shown to be safe and well tolerated in the first-in-human study. SOMA HEALTH Urolithin A Gummies provide 1,000 mg in a four-gummy daily serving.
Can I take beetroot and urolithin A together?
Conceptually they complement each other because one supports blood flow and the other supports cellular energy production. If you take blood-pressure medication, note that dietary nitrate can affect blood pressure, so check with your doctor first.
Is urolithin A a stimulant?
No. It is a gut postbiotic derived from ellagitannins in foods like pomegranate and walnuts. It contains no caffeine or stimulants and works by supporting mitophagy, the recycling of worn mitochondria, rather than by stimulating the nervous system.
Is either a treatment for a health condition?
No. Both are structure/function supplements, not treatments for cardiovascular disease, fatigue from illness, or any muscle disorder. If you have a medical condition or persistent symptoms, see your doctor before adding either.
*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.
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