A normal adult, excluding exercise expenses,

consumes about 100 calories per hour,

this number is about 60 calories during sleep,

that is, the normal non-exercise need of a day is about 2,000 calories,

and the calorie amount of human body fat is 7,700 calories for 1kg of fat;

If the daily calorie intake of a person is lower than 600 calories, it will be dangerous for a long time.

If a person's daily calorie intake is lower than 600 calories, in the long run, it will be life-threatening

This is the most important thing to remember.