Nutrition, originally meant to seek health, mainly refers to the function of the human body to absorb nutrients from the outside to maintain life activities such as growth and development. Or the process that the human body obtains and uses the materials and energy necessary for its life activities. Therefore, nutrition represents an action, behavior or biological process.
It should be noted that nutrition is not the same as food or nutrients. The understanding of the word "nutrition" in society is not correct enough, and the words are inappropriate, such as rich nutrition, rich nutrition, and whether there is nutrition or not. The correct way is to change it to nutritious or nutritious.
A person's nutritional status refers to the physical condition related to nutrition, that is, the health status of food ingredients and the utilization status of nutritional ingredients. Can be divided into individuals and groups. Generally, some special nutrients will be involved. Sometimes, there will be a comprehensive evaluation of all nutrients, that is, the overall nutritional status, such as iron, protein, vitamins and so on.
nutrient source
The source of nutrition is generally nutritious food to meet the special needs of people with abnormal digestion or metabolism, or to meet people with special curative effects by controlling the intake of food or some nutrients. This kind of food is not prepared at will, and it often needs careful calculation and careful observation and test to be determined. In most cases, various nutritious foods can be prepared or combined according to the special nutritional needs of patients with various physiological disorders or the additional nutritional needs of healthy people.
Generally speaking, the nutrients contained in nutritious food can be divided into two categories, namely macro-nutrients and micro-nutrients. 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.