Urolithin A

Urolithin A is a first-in-class postbiotic metabolite produced by the gut microbiome from ellagitannins and ellagic acid, polyphenols naturally found in pomegranates, strawberries, and walnuts. Since only an estimated 40% of the population possesses the specific gut flora required to synthesize it, supplementation has become the primary method to ensure therapeutic concentrations. It is widely recognized in longevity science for its unique ability to rejuvenate cellular health.

The primary mechanism of Urolithin A is the induction of mitophagy, the selective recycling of damaged or dysfunctional mitochondria. By clearing out these inefficient 'powerhouses,' it promotes the biogenesis of new, healthy mitochondria, thereby improving cellular energy production. Beyond mitochondrial health, research published in 2024 and 2025 indicates it reduces systemic inflammation (inflammaging) by downregulating cytokines like IL-6 and enhances immune resilience by increasing the population of naive T-cells and Natural Killer (NK) cells.

• Dosage: Most clinical research, including the foundational Singh et al. (2022) studies, supports a daily dose of 500mg to 1,000mg. The higher 1,000mg dose is preferred for significant improvements in muscle endurance and inflammation. • Duration: While mitochondrial biomarkers typically improve within 4 weeks, measurable gains in muscle strength and physical performance generally require consistent use for at least 4 months. • Usage Case: It is highly recommended for middle-aged and older adults to counteract sarcopenia (muscle loss) and for athletes seeking to improve VO2 max and post-exercise recovery. • Expert Note: Consult a healthcare provider if you are taking metabolic medications or anticoagulants, as Urolithin A influences metabolic pathways and immune signaling.