The process is quite simple, actually. To lose weight, all you have to do is decrease your overall calorific intake and increase your metabolic rate by burning a lot of calories. Calories creep into the body in the form of fatty food items and they stay there. Fried food, junk food and all other kinds of fatty food contribute to weight gain and obesity. During weight loss, you should go on a diet of fresh fruits and vegetables. These will keep you healthy (as they have all necessary nutrients) but they bring with them low calories. When you exercise, your body will burn the excess fat, contributing to weight loss.