In this summer, among the people aiming at health or fat reduction, the "21 day light meal" is also on fire with Liu Zhenhong's aerobics. 21 day reading plan, 21 day word clock in, 21 days to develop a good habit, recently, the magical "21 day law" has extended a new saying - "21 days to eat a good body". For those who "can't walk away from their legs", the "21 day fat reduction whole meal" seems to have become a "Gospel" for lazy people. Search for "21 day fat reduction meal" on the e-commerce platform, and the number of relevant brands has increased from two or three to dozens. There are many kinds of packages: packages composed of high fiber biscuits, chicken breast and rye bread emphasize the sense of satiety and need to match with fruits and vegetables; Three cups of chicken, Jasper fish tofu, Coprinus comatus meat slices, coarse grain rice and other dinner packages include meat, vegetables, rice and soup. They need to be heated compared with raw and cold food, but they emphasize that dinner can be full and nutritious. The prices of different packages also range from hundreds of yuan to about 2000 yuan. In addition to 21 day meals, brands also have 1-day meals, 3-day meals and other packages for trial experience, while 7-day meals and 21 day meals focus more on systematic and periodic food health management. In fact, with the improvement of people's health awareness, the dietary structure is gradually changing. The card controlled light food with low fat, low calorie, low sugar, low salt, high fiber and high satiety is becoming more and more popular. For light food, many people will think that it is a diet, do not eat meat, do not eat staple food, and only eat vegetables and fruits. But today's light food is no longer limited to this, including low-fat and high protein meat, Cereals, and simple snacks such as dried fruits, yogurt and fruits. At the same time, the cooking method should be less oil, less salt and light. Reasonable distribution of three meals a day and appropriate snacks. The survey shows that among the "light food generation" crowd, women will show a higher preference than men. Middle-aged and young people under the age of 40 account for 66%, of which young people under the age of 30 are more interested, and high-speed urban users are the mainstream fans of this topic. Experts say that losing weight is actually creating poor calories. The popular fat reducing whole meal on the market actually matches the diet scientifically on the basis of meeting the nutrients needed by the human body, providing lower energy intake, thus forming an energy gap. However, it is not recommended to rely on fat reducing meals for a long time to lose weight, otherwise once the human body adapts to the new metabolic mode, it will fall into a new "bottleneck". And some products can not meet the basic metabolism of human body, and even cause skin yellowing, hair loss and other malnutrition. Through a regular lifestyle and proper exercise to improve the level of human metabolism, we can achieve the effect of healthy weight loss. (outlook new era)