Ben Greenfield Life

This FASCINATING Molecule Originally Boosted Muscle & Endurance But Is *Now* Being Shown To Reverse Immune Aging?! Urolithin A With Dr. Anurag Singh

Ben Greenfield Life with Dr. Anurag Singh 2025-09-04

Summary

Ben Greenfield speaks with Dr. Anurag Singh, Chief Medical Officer at Timeline, about Urolithin A (marketed as Mitopure), a postbiotic molecule that has shown remarkable benefits for both muscle performance and immune health. Dr. Singh, who holds an M.D. in internal medicine and a Ph.D. in immunology, explains how his decade-long research across multiple clinical trials has demonstrated that Urolithin A supports mitochondrial health by activating mitophagy, the process by which cells clear out damaged mitochondria.

The discussion explores how Urolithin A was initially studied for its effects on muscle strength and endurance but is now being shown to reverse aspects of immune aging. Dr. Singh describes the mechanism by which improved mitochondrial function in immune cells leads to a more youthful and responsive immune system. With over 50 published articles and 20 patents, he outlines the clinical evidence behind Timeline's consumer products and how targeted mitochondrial support represents a new frontier in healthy aging.

Key Points

  • Urolithin A (Mitopure) is a postbiotic that activates mitophagy, clearing damaged mitochondria from cells
  • Originally studied for muscle strength and endurance benefits, it now shows promise for reversing immune aging
  • Improved mitochondrial function in immune cells can restore a more youthful immune response
  • Urolithin A is produced naturally from ellagitannins found in pomegranates, but most people cannot produce enough on their own
  • Multiple randomized clinical trials support the efficacy of supplemental Urolithin A
  • Timeline's Mitopure delivers a precise, clinically validated dose of the molecule
  • Mitochondrial health is emerging as a central target for longevity and healthy aging interventions

Key Moments

Only 10% of Americans produce urolithin A naturally

1000mg urolithin A shows peak performance benefits. Only 10% of Americans produce it from diet vs. 33% of Mediterranean populations.

"In the U.S., we see one in 10. Only 10-12% of healthy adults who think they're eating right, about one out of 10 having circulating levels of urolithin A."

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