Very-Low-Calorie Diets for Obesity

Very-low-calorie diets (VLCDs) are diets that severely restrict calorie intake, typically to 800 calories per day or less. They are used as a short-term intervention for people who are severely obese and need to lose weight quickly to reduce the risk of health complications. VLCDs may also be used to jump-start a weight loss program for people who have a lot of weight to lose.

VLCDs typically consist of liquid meal replacements that provide a balance of essential nutrients while restricting calories. These meal replacements are usually in the form of shakes, soups, or bars. VLCDs should only be followed under the supervision of a healthcare professional, as they can have potentially serious side effects, such as gallstones, electrolyte imbalances, and cardiac arrhythmias.

VLCDs are not intended for long-term use, and people who follow a VLCD should transition to a healthy, balanced diet once they have reached their weight loss goals. It is important to note that VLCDs are not appropriate for everyone, and should only be used under the guidance of a healthcare professional.