Flat Belly Flush is a term used for different programs that claim to help you lose belly fat and detox your body by following certain diets, drinks, herbs, spices, and oils. Some of these programs are based on intermittent fasting, eating during specific times of the day, or drinking "red water". Others are based on a recent discovery of a digestive glitch that affects people over 40 and prevents them from burning fat. Some also mention a condition called "Fat Oxidation Syndrome" that causes food to be stored as fat instead of energy.