Calories are units of Calories, cal, which is transliterated from English calories. It is defined as the heat required to raise 1 gram of water to 1 degree Celsius at 1 atmospheric pressure. Calories are units of energy,

heat source

Calories come from carbohydrates, fats and protein.

Heat generated by carbohydrates = 4 kcal/g.

Heat generated in protein = 4 kcal/g.

Heat produced by fat = 9 kcal/g.

Extended data:

Need heat

Daily calorie requirement of adults = basic calorie required for basic metabolism of human body+calorie required for physical activity+calorie required for digestion of food.

Heat required for digesting food = 10% x (minimum heat required for basic metabolism of human body+heat required for physical activity)

Daily caloric requirement of adults = 1. 1 x (minimum basal caloric requirement for basic metabolism of human body+caloric requirement for physical activity).

Male: 9250- 10090KJ

Female: 7980-8820 kJ

Note: The daily calories provided by food should not be less than 5,000-7,500 kilojoules, which is the least energy to maintain normal life activities.

A simple algorithm for basic calorie metabolism of human body

Female: basic calories = weight (kg) x 9

Man: Basic calories (calories) = weight (kg) x 10.

Accurate algorithm of basic heat

female

Age formula

18- 30 years old 14.6 x body weight (kg) +450

3 1- 60 years old 8.6 x weight (kg) +830

Over 60 years old, 10.4 x body weight (kg) +600

man

18- 30 years old 15.2 x body weight (kg) +680

3 1- 60 years old 1 1.5 x body weight (kg) +830

Over 60 years old 13.4 x body weight (kg) +490

References:

Baidu encyclopedia-calories