The cabbage soup diet is a radical weight loss diet designed around heavy consumption of a low-calorie cabbage soup over the time of seven days. It is generally considered a fad diet, in that it is designed for short-term weight-loss and requires no long-term commitment. It has inspired several copy-cats based around similar principles.
The typical claimed intent of the diet is to lose 10 pounds (4.5 kg) of weight in a week, though nutritional experts point out that it is nearly impossible to lose that much fat within a week. This has lent credence to claims that much of the weight lost is water.