The cabbage soup diet is a short-term weight loss plan that primarily involves consuming a special soup made from cabbage and various vegetables. This diet is typically followed for seven days, during which participants can eat the soup along with specific foods each day, such as fruits, vegetables, and lean proteins. The goal is to promote rapid weight loss through a low-calorie intake. While the cabbage soup diet can lead to quick weight loss, it is not considered a sustainable or balanced long-term eating plan. Nutritionists often caution against extreme diets like this, as they may lack essential nutrients and can lead to rebound weight gain once normal eating resumes.