Light index finger refers to carbohydrates with low glycemic index, low-fat meat, high-quality protein and green leafy vegetables. The light diet is mainly low in sugar, fat and salt. As long as it is balanced, natural, light, low in calories and does not increase the burden on the body, it can be used as a light food ingredient. Eating lightly does not mean that there is no meat or oil. Its core is to control the total energy, that is, to reduce the intake of fat and salt. On this premise, we should also ensure a certain amount of protein and carbohydrates, and increase the intake of dietary fiber, vitamins, minerals and other micronutrients.