Urolithin A dosage: 500 mg, 1,000 mg, and nothing else tested

The two doses that were actually studied

Early / mixed evidence A randomized placebo-controlled trial in older adults administered the compound daily for four weeks and then four months, reporting mitochondrial gene expression and plasma biomarker changes without meeting its primary muscle endpoint.^[1] A subsequent trial in middle-aged adults using 500 mg and 1,000 mg daily over four months reported improved muscle endurance and lower inflammatory markers.^[2]

A systematic review of the human literature confirms that this is the studied range, and that the healthspan impact remains unestablished at any dose.^[3]

Why the dose question is simpler here

Most supplement categories have a wide gap between trial doses and product doses. This one does not, largely because the ingredient is patented and the company that ran the trials also sells it. Whatever else that arrangement does, it has kept the label honest about quantity.

Most strategies would go blend urolithin and start selling.

The practical consequence is unusual: taking a trial dose is straightforward, and taking anything else discards the only real advantage this compound has over its competitors.

Why food cannot deliver a urolithin A dosage

The compound is not in food. Pomegranates, walnuts, strawberries and raspberries supply ellagitannins, and gut bacteria convert those into urolithin A at rates that vary substantially between people.^[4]

So there is no dietary equivalent of 500 mg. Eating pomegranate is good for other reasons and is not a route to a specific dose of this metabolite. That is the clearest legitimate argument for the supplement existing.

I can drink six glasses of juice, my body just refuses to make urolithin.

Timing, food and duration

Trials generally dosed once daily with a meal and continued for four months. None of the alternatives has been compared: not evening dosing, not fasted dosing, not splitting the dose. Following the trial conditions is simply the defensible default where nothing else was tested.

Duration matters more than most people expect. Biomarker changes appeared before functional ones, and the endurance findings emerged over months. Judging the supplement after three weeks is judging it before the studies would have found anything.

Dose and effect size

Both doses produced measurable effects and neither was shown superior for a meaningful outcome. Some biomarker responses looked dose-dependent, which predicts more of the marker at 1,000 mg rather than more benefit.

It is worth keeping the size of the underlying effect in view while choosing between them. Reviews describe effects on inflammation and muscle performance in animal and human work that are real and modest.^[5] Doubling the dose of a modest effect gives you, at best, a slightly less modest one.

Safety at these doses

Tolerability in the trials was good at both amounts over months, with no serious adverse events reported. Institutional summaries treat the compound as investigational rather than established, which is the correct posture for something with this evidence base.^[6]

There is no evidence in pregnancy or breastfeeding, no interaction data with common medicines, and no data beyond a few months. None of that is alarming and all of it belongs in the decision.

The sensible position on urolithin A dosage

Take a dose that was studied or do not take it. The entire case for this compound over the rest of the supplement shelf is that human trials measured something at specific amounts; improvising a different amount throws that away and leaves you with an expensive capsule and a mechanism.

Our page on what those trials actually found covers the effect sizes, our review of urolithin A products covers what to check on a label, and the wider supplement review puts it in context against the alternatives.

Frequently asked questions

What is the right urolithin A dosage?

The doses with human trials behind them are 500 mg and 1,000 mg daily. Those are the only two figures worth taking seriously, because they are the ones that were actually administered in randomized studies.

Is 500 mg or 1,000 mg better?

Both have been studied and neither has been shown superior for an outcome that matters. Some biomarker effects appeared dose-dependent, which is a reason to expect more of the marker at the higher dose rather than more benefit.

How much pomegranate would give the same amount?

You cannot reliably get there through food, and that is the honest core of the product's existence. Pomegranate and walnuts supply ellagitannins, and whether your gut bacteria convert them into meaningful urolithin A varies between individuals.

How long before urolithin A works?

The trials reporting effects ran four months. Biomarker changes appeared earlier than functional ones. Anything noticed in the first fortnight is unlikely to be this compound.

Should it be taken with food?

Trials generally administered it with a meal, and no study has compared taking it with or without food. Following the trial condition is the defensible default when nobody has tested the alternative.

Does urolithin A dosage depend on body weight?

No human study has established weight-based dosing. The trials used fixed doses of 500 mg and 1,000 mg regardless of body size.

Is there an upper limit?

None has been established. Trials at 1,000 mg daily over months reported good tolerability and no serious adverse events, and no study has tested higher doses for longer.

Do I need to test whether I am a converter?

Tests exist and no established action follows from the result. If you are taking the compound directly, your conversion capacity is irrelevant, since the supplement bypasses the step entirely.

Should it be cycled?

No cycling schedule has been studied. Trials dosed continuously for four months, which is the only pattern with evidence behind it.

Can it be stacked with other supplements?

There is no comparative data on any combination. Stacking with creatine or protein is common among people taking it for muscle reasons, and creatine has considerably stronger evidence for that purpose on its own.

Who should not take it?

Anyone pregnant or breastfeeding, on the basis of absent evidence. Anyone on prescription medication should mention it, since interactions have not been studied.

Does a higher dose speed things up?

Nothing suggests it does. The functional endpoints in the trials took months at both doses, and there is no evidence that a larger amount shortens that.

Are the doses in products consistent with the trials?

Most branded products supply the trial doses, which is unusual in this category and reflects that the ingredient is patented and sold by the company that ran the studies. Generic versions vary more and are worth checking.

What is the sensible position on dosing?

Use a trial dose or do not bother. Since the only reason to take this compound is that human trials measured something, taking an amount those trials did not test discards the single advantage it has over the rest of the shelf.