Is your gut microbiome the most important organ you're ignoring? In this episode of The Dan Buettner Podcast, world-renowned geneticist and epidemiologist Dr. Tim Spector reveals groundbreaking research on why the microbes in your gut are the ultimate indicator of your health and resilience.

Drawing from a massive study of 300,000 samples recently published in Nature, Dr. Spector explains a startling "health gap": why American gut health is significantly worse than that of Europeans. We explore why a stool test may provide more critical health insights than a standard blood or DNA test, and how the "30-plant rule" can fundamentally reprogram your immune system.