Many discuss the importance of drinking plenty of water and recommend medical supervision. However, in most circumstances, the negatives outweigh the positives. There are other, more reliable and safe resources for learning about weight loss, such as your health care provider, a registered dietitian, a hospital-based health education center and public health agencies. I know people who have been successful on these diets. First, it is very difficult to maintain these restrictive low calorie diets long-term.
Most people gain weight back after returning to their usual eating habits.
Moreover, following severely restricted diets without medical guidance can lead to serious health consequences. Any low calorie diet has the potential to be nutrient deficient. This is also true for diets that restrict specific foods or food groups. If you need a diet less than 1600 calories to effect weight loss, it is best to discuss this with your physician or dietitian. They can help assure your nutrient needs are being met.