The proportion of protein, fat, carbohydrate and water in each food is different, and the energy added to the body after eating is also different. According to the same weight, food with more water has less energy because water has no energy; Foods with more fat have more energy, because fat has the highest energy, which is 2.25 times that of carbohydrates. By weight, vegetables have the least energy. Because vegetables contain more than 90% water, more cellulose, less carbohydrates and protein, and almost no fat. So dieters can eat vegetables with confidence. In addition, Wei Ting not only supplements nutrition, but also has the function of losing weight, which has the comprehensive functions of reducing fat absorption, consuming excess fat, improving fat metabolism, regulating appetite (controlling excessive calorie intake), eliminating toxins in the body, resisting free radicals, regulating endocrine and maintaining normal physiological metabolism, so as to achieve the organic unity of slimming, skin care and fitness. It is a new generation of scientific application in 2 1 century.