2. The total calories that women need in a day are between 1500 and 1800 calories.
Under no circumstances should a person's total daily calorie intake be less than 1200 calories.
Specific analysis:
1, heat is an indispensable fuel for human body. In our daily work and life, blood circulation, breathing, digestion and absorption all need heat. Even if we lie still, our bodies still need heat to maintain body temperature, cardiopulmonary function and brain operation.
2. The consequences of long-term insufficient calorie intake are worrying, especially for people who consume less than 800 calories a day. After three or four months, it will become weak and weak, and symptoms such as diarrhea and constipation will appear, which will also affect the salt and cholesterol content in bile and cause gallstones.
All the calories needed by human body 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.