Urolithin A is a natural metabolite produced by gut bacteria from the digestion of ellagitannins and ellagic acid, compounds found in pomegranates, berries, and nuts. It is widely studied for its ability to improve mitochondrial function and promote mitophagy, the process of clearing damaged mitochondria. Urolithin A is recognized for its potential anti-aging, anti-inflammatory, and muscle health benefits, and is commonly used in dietary supplements and longevity research.