All the calories the human body needs come from food. Carbohydrate, fat and protein are the main sources of calories. Each gram of carbohydrate and protein can provide 4 calories for human body, and each gram of fat can produce 9 calories.
Basic calorie algorithm to meet the basic metabolic needs of human body;
Female: basic calories (kilocalories) = weight (kg) x9;
Male: Basic calorie (kcal) = weight (kg) x 10.
Extended data:
Heating action:
Just as computers consume electricity and trucks consume oil, so do human daily activities. Heat not only provides energy for people's exercise, daily work and life, but also provides energy for human life activities, blood circulation, breathing, digestion and absorption. People who lose weight can burn fat through exercise, which can accelerate calorie consumption and achieve the goal of healthy weight loss.
Heat source:
1, heat energy generated by carbohydrates = 4 kcal/g;
2. Heat generated in protein = 4 kcal/g;
3. Heat generated by fat = 9 calories/gram.
Baidu encyclopedia-calories
Baidu encyclopedia-heat