Urolithin A

Discover 2 whole food sources of Urolithin A, certified organic growers, and the latest longevity research on this bioactive compound.

Urolithin A is a postbiotic compound produced when gut bacteria metabolize ellagitannins—plant polyphenols found in berries, pomegranates, and nuts—into a bioactive form that can be absorbed and utilized by human cells.

Mechanism of action

Urolithin A activates mitophagy, the selective autophagy pathway that removes damaged or dysfunctional mitochondria, thereby promoting mitochondrial quality control and cellular energy metabolism. The mechanism appears to involve calcium-dependent signaling that modulates inter-organellar communication. This mitochondrial housekeeping process may enhance cellular resilience during aging and metabolic stress. Evidence suggests these effects occur through p62-dependent lysophagy pathways and downstream mitochondrial transcriptomic changes.

Evidence overview

Multiple randomized controlled trials and mechanistic studies support urolithin A's role as a mitophagy inducer with potential longevity relevance. A key RCT demonstrated effects on age-related immune function, and preclinical studies show urolithin A modulates inter-organellar calcium signaling to promote mitochondrial quality control, reduces anxiety-related behaviors while rescuing mitochondrial gene expression in animal models, and improves cardiovascular health biomarkers in humans. Supporting evidence includes studies on retinal neuroprotection via lysophagy induction and microglial immune regulation. The evidence base is predominantly moderate to strong in mechanistic studies and RCT design, though human longevity outcome data remains limited. Some in vitro studies show neutral or nuanced effects on immune cell metabolism, indicating that effects may be cell-type or context dependent.

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