New research suggests that prebiotics, which serve as food for good bacteria inside the gut, can also improve sleep and buffer the physiological impacts of stress. In recent years, reams of research papers have shed light on the health benefits of probiotics, the “good bacteria” found in fermented foods and dietary supplements. Now a first-of-its kind study by University of Colorado Boulder scientists suggests that lesser-known gut-health promoters known as prebiotics – which serve as food for good bacteria inside…