Dr William Davis provides solutions to health problems by addressing the microbiome, which is massively disrupted in modern people. He is also a champion of individual self-directed health, and has written several books including Super Gut, Wheat Belly and Undoctored. Dr Davis lives what he preaches, not having indulged in a wheat-containing bagel, ciabatta, or pretzel in many years, while consuming various fermentation products that yield unexpected health benefits. He lives in Milwaukee, Wisconsin.