 The study was designed to investigate the effects of a very low carbohydrate diet VLCD intervention on weight control in overweightobese patients in China.All the subjects were randomly assigned to experiment group and control group. The experimental group was given individual instructions on how to follow the VLCD very low carbohydrate diet. The control group was given an energy-restricted diet.The energy-restricted diet ER diet was designed in the traditional Chinese style with an initial target for a total energy intake of 1200 kcald 5021 kJd. 