Different foods have different nutritional values because of their different nutritional components. For example, the nutritional value of grain is mainly reflected in that it can provide more carbohydrates, but the quality and quantity of protein contained in it are relatively low, so its nutritional value is relatively poor; Vegetables and fruits can provide rich vitamins, minerals and dietary fiber, but the content of protein and fat is very low, so the nutritional value is low.
Some drinks on the market are made of food additives such as food pigments, flavors, artificial sweeteners and so on, which have almost no nutritional value.
Extended data
Generally speaking, the nutrients contained in nutritious food can be divided into two categories-macronutrients and micronutrients. Macronutrients include protein, fat, carbohydrates and some minerals.
They are in great demand every day, constitute the vast majority of food, and provide the energy and material needed for body growth, metabolism and exercise. The demand for micronutrients is very small, ranging from a few milligrams (11000g) to a few micrograms (11000g), including vitamins and some trace elements, which can catalyze the utilization of macronutrients.
Baidu encyclopedia-nutrition
Baidu encyclopedia-nutritional value