Research has revealed that we have numerous biological clocks that each operate on an approximately 24-hour cycle. If those clocks go out of sync, we may face an increased vulnerability to various kinds of diseases. We focus on how understanding your circadian rhythm is used to discover more effective ways to prevent or treat illnesses, such as meal plans to adjust our body clocks and cancer treatments with fewer side effects. We also learn about what food items to eat and when, to prevent obesity and get a good night's sleep.