According to ABC News, any significant overnight weight loss is likely attributed to loss of water, therefore making it impossible to lose 10 pounds of body fat in that time span. ABC News indicates that a calorie deficit of 3,500 must be attained to lose 1 pound of fat.
A steady, healthy diet and exercise remain the best methods of losing weight. WebMD cautions that carbohydrates, protein and fat are necessary for healthy weight loss, no matter what kind of diet is used. Moderate portions are recommended, such as filling half of a plate with vegetables and fruits and the other half with lean protein and grains. A calorie budget that is dependent on body weight and expected weight loss is also necessary.