The Cabbage soup diet is a seven-day program where dieters are allowed all the water and cabbage soup they want, plus a very restricted set of other foods. After a week, the program promises a 10-pound weight loss, but dieters are restricted to staying on the diet for only one week at a time. Because of how quickly it works, celebrities like Sarah-Michelle Gellar go on this diet for the week before Oscar-night. Many nutritionists and medical experts are critical of the cabbage soup diet, claiming that most of the weight loss is water and therefore not permanent. They also say that the soup is often extremely high in sodium and provides practically no protein. Not surprisingly, many people report feeling weak and light-headed while on the diet.