As we age, muscle strength and endurance naturally decline—a condition known as sarcopenia. One key driver of this process is the accumulation of dysfunctional mitochondria within muscle cells. Urolithin A, a postbiotic compound derived from ellagitannins (found in pomegranates, berries, and walnuts), has gained attention for its unique ability to stimulate mitophagy—a selective form of autophagy that clears out damaged mitochondria. This article explores how Urolithin A supports muscle function, healthy aging, and physical performance.