What is a very low calorie diet?
A very low-calorie diet (VLCD) is a doctor-supervised diet that typically uses commercially prepared formulas to promote rapid weight loss in patients who are obese. These formulas, usually liquid shakes or bars, replace all food intake for several weeks or months. VLCD formulas need to contain appropriate levels of vitamins and micronutrients to ensure that patients meet their nutritional requirements. Some physicians also prescribe very low-calorie diets made up almost entirely of lean protein foods, such as fish and chicken. People on a VLCD consume about 800 calories per day or less. VLCD formulas are not the same as the meal replacements you can find at grocery stores or pharmacies, which are meant to subsitute for one or two meals a day. Over-the-counter meal replacements such as bars, entrees, or shakes should account for only part of ones daily calories. When used under proper medical supervision, VLCDs may produce significant short-term weight loss in patients who are moderate
