Nutrients that can provide calories in the diet are sugar (carbohydrate), fat, protein, alcohol, organic acids and so on. The calories they contain are: sugar (carbohydrate) 4 calories, fat 9 calories, protein 4 calories, alcohol 7 calories and organic acid 2.4 calories.

To calculate the calories contained in food or diet, we must first know the weight of calorie nutrients, and then use the following formula to calculate:

Calories (kilocalories) = grams of sugar ×4+ grams of protein ×4+ grams of fat ×9+ grams of alcohol × 7.

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Extended data

The way the body consumes calories.

1, the first part is basal metabolic rate, which accounts for about 65 ~ 70% of the total calorie consumption of human body;

2. The second part is physical activity, accounting for about15 ~ 30% of the total calorie consumption;

3. The third part is the thermal effect of food, accounting for at least about 10%, and the ratio of the three has been fixed.

Nutrients that can produce calories in food are protein, fat, sugar and carbohydrate. They are oxidized to generate heat for the body to maintain life, grow and develop and exercise. When there is too much heat supply, the excess heat will be stored as fat. After a long time, the body will get fat.

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