Why fast when you can eat? The 2-Day Diet is clinically proven to work and you won"t go hungry. Now it"s even easier to follow and stick to! Simply eat a low-carb diet for two days a week and normally but sensibly for the other five. This is the original 5:2 diet everyone is talking about, so get ready to lose more weight and twice as much fat as on a standard calorie-controlled diet.