A recent review in the journal Immunology Letters suggests that the timing of meals can give your immune system an edge. “Intermittent fasting increases the rate of autophagy [cell recycling] and, therefore, decreases the amount of inflammation in the body,” says Jamal Uddin, Ph.D., a coauthor of the study. “This in turn lets the immune system more efficiently spend its resources fighting off illness.” In a nutshell, the extended calorie drought prompts your body to look for a refuel by