Very low calorie diet (VLCD) is a diet with very or extremely low calorie consumption per day. It is defined medically as a diet of 800 calories per day or less. VLCDs are formulated, nutritionally complete, liquid meals containing 3350 kJ (800 kcal) or less per day. VLCDs also contain the recommended daily requirements for vitamins, minerals, trace elements, fatty acids and protein. The VLCD products are usually a powder which is mixed with water or another low calorie liquid.
Because of the extremely low calories per day, a VLCD diet cannot be used by children no matter how obese.
A VLCD should never be undertaken without medical supervision.
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