Urolithin A is one of the most exciting compounds in longevity science right now. Unlike antioxidants or NAD+, urolithin A works on a different level—activating mitophagy, your body’s built-in cleanup system that clears out damaged mitochondria and replaces them with new, healthy mitochondria. Dr. Anurag Singh, Chief Medical Officer at Timeline Longevity, has spent years leading the research on urolithin A. In this episode, he shares what the science actually shows—and why it matters for performance, recovery, immune resilience, and even brain health. Here’s what we cover: -How much urolithin A you get from diet versus supplements -What “inflammaging” and “immunosenescence” mean—and how immune decline drives aging -How urolithin A supports endurance, strength, and recovery -What the latest research shows about neuroprotection, cognition, and healthy aging -Why lifestyle tools like fasting, exercise, and nutrition amplify urolithin A’s effects This episode is a full look at mitochondrial health, immune resilience, and a molecule that could reshape how we think about aging. Full shownotes here: https://bengreenfieldlife.com/podcast/timelineimmunity/ Ben Greenfield Life Website: https://bengreenfieldlife.com/ Ben Greenfield Life Podcast: https://bengreenfieldlife.com/podcast/ Ben Greenfield Books: https://shopbengreenfieldlife.com/collections/books Instagram https://www.instagram.com/bengreenfieldfitness/ Facebook https://www.facebook.com/BGFitness X https://twitter.com/bengreenfield TikTok https://www.tiktok.com/@bengreenfield