According to the book Calories and protein Intake published by the World Health Organization, a healthy adult woman needs to consume1800 ~1900 calories every day, while men need1980 ~ 2340 calories.
Among them, the intake of protein should be10% ~15% of the daily calories needed by human body; The carbohydrate intake should be no less than 55% of the daily calories needed by the human body; The intake of fat should not exceed 30% of the daily calories.
In addition, the daily intake of salt should not exceed 6 grams, and the daily intake of dietary fiber should not be less than 16 grams.
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Generally speaking, adults need at least 1500 kcal of energy every day to maintain body function, because even if you lie still, your body still needs energy to maintain body temperature, cardiopulmonary function and brain operation. Basal metabolic consumption will be different due to the differences of individual height, weight, age and gender.
Human beings need energy to survive and get it from food. The calorie content in food is a measure of how much potential energy the food produces. 1 g carbohydrate contains 4 calories, 1 g protein contains 4 calories and 1 g fat contains 9 calories.
Food is generally composed of these three substances. Therefore, as long as we know the contents of these three substances in food, we can know how many calories or how much energy food contains.
A simple algorithm for the basic calorie of human body's basic metabolism;
Woman: Basic calories (calories) = weight (kg) x9
Male: Basic calories (calories) = weight (kg) x 10.
References:
/baike.baidu.com/item/ calories /284236? fr=aladdin"target="_blank"> Calories _ Baidu Encyclopedia