Urolithin A is a metabolite compound produced by gut bacteria during the metabolism of ellagitannins.
Its precursors, ellagic acids and ellagitannins, are found in many plants, including edible ones like pomegranates, strawberries, raspberries, and walnuts.
Since the early 2000s, urolithin A has been the focus of exploratory research into its potential biological effects.
Urolithin A is not known to be present in any food.
Its bioavailability is largely determined by the composition of the particular microbiota, since only a few bacteria are capable of converting ellagitannins into urolithins.