The reason consultants must try fasting! Heres the major benefits. 1. fat burning - when you fast 12-16 hours or more your body goes into ketosis switching fuels from sugar/carb burning into fat burning. 2. Cellular repair/autophagy when you fast your body gets rid of old damage cells and replaces them with newer healthier ones 3. Insulin sensitivity - your insulin drops back down to baseline if you wanted to burn extra fat in ketosis exercising in that state would be very beneficial! 4. Blood sugar control your blood sugar drops and you're able to bring your energy levels back to normal and be stable without crashes but heres what i have to say to this take electrolytes when you fast mix it with water and NEVER PUSH YOURSELF IN A FAST. Theres people who pass out for the first time. Whenever you are hungry EAT! Please do this gradually.