The importance of the microbiome has really come to the fore in the last five years. Viome, a company that analyzed the feces of 100,000 people, has discovered 10,000 new types of gut bacteria. Additionally, Improved imaging technology led scientists to discover you don’t have just one microbiome, you have two. The second one is in your brain, populated by the same bacteria that live in your gut. Simple habits can foster healthy gut and brain bacteria, which can help you live longer and age more slowly. Eat mostly vegetables, take fiber and prebiotics, and practice intermittent fasting, says Dave Asprey.