Yogurt is a fermented food that has existed for centuries with bioactive properties that have long been thought to be beneficial to health. The first commercial yogurts, sold over a hundred years ago in pharmacies, were recommended to treat digestive disorders. Yogurt: Roles in Nutrition and Impacts on Health compiles the scientific research to date into a comprehensive reference book that explores yogurt's role in diet and health, its composition in micro- and macronutrients, and the potential mechanisms underlying its health benefits.