Physiological requirement is a term of parenteral and enteral nutrition published by the National Committee for Science and Technology Terminology Examination 20 19, which refers to the amount of energy and various nutrients needed by the human body to maintain normal metabolism.

Physiological needs are the most basic and minimum needs of human beings. Such as food, clothing, housing and transportation, to meet the needs of hunger and cold and sleep. If these needs can't be met at a minimum, human beings can't continue to survive and reproduce.

Calculation formula of physiological requirement:

The calculation formula of physiological requirement is: body weight is less than 10kg, daily fluid requirement = 100ml/kg, body weight is1~ 20kg, and daily fluid requirement = 1000+[ body weight (kg)-/.

Physiological requirement refers to the necessary amount of heat energy and various nutrients needed by human body, which can maintain human health, reach the proper level of development and fully carry out various physical and mental activities. There are many different opinions on the principle basis of formulating physiological requirements, and there are also different considerations among nutrients. But it is nothing more than two aspects: crowd investigation and experimental research, and the combination of the two is more comprehensive.