In this episode of the Decoding Health, Dr. Urban Kiernan breaks down the science behind Urolithin A, a gut-derived compound gaining attention for its role in mitochondrial health, muscle performance, and metabolic function.

The conversation explains what Urolithin A actually is (and what it isn’t), how it’s produced through the gut microbiome, and why it’s fundamentally different from peptides. Dr. Urban walks through the concept of mitophagy—the cellular process that clears damaged mitochondria and replaces them with healthier ones—and why this matters for energy production, aging, athletic performance, and overall metabolic resilience.

The episode explores how Urolithin A relates to autophagy and intermittent fasting, why muscle tissue is especially dependent on mitochondrial health, and what current research suggests about strength, endurance, and recovery. Dr. Urban emphasizes supplement quality, regulatory gaps in nutraceuticals, and what to look for when evaluating products, including GMP standards and third-party testing.

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Urolithin A Explained: The Mitochondrial Upgrade Everyone’s Talking About