Generally speaking, adults need at least 65,438+0,500 calories a day to maintain their body function, because even if you lie still, your body still needs to be able to maintain body temperature, cardiopulmonary function and brain operation. Basal metabolic consumption varies with individual height, weight, age and gender.

Controlling energy intake and proper exercise are very effective ways to lose weight, and most doctors think it is the healthiest way to lose weight. This mechanism is very simple. When the daily energy intake is not enough to provide the energy consumed by the body, the body will call the sugar and fat stored in it. When fat is broken down and provides energy for the body, the process of losing weight begins. It should be noted that some doctors pointed out that the control of energy intake should be gradual to ensure that the human body can adapt to it for a long time, and the energy intake per day is generally not less than 800 calories, otherwise the human body will make up for the lack of energy intake by reducing its body function, which will usually lead to dizziness and fatigue, and the reduction of basal metabolic consumption will also affect the efficiency of weight loss.

The total calorie intake of a normal person should be 2000 calories a day, and people who exercise can increase it appropriately. The following table lists the daily intake of various ingredients and their calorie ratios: (Among them, each gram of fat contains 9 calories; Each gram of carbohydrate contains 4 calories; Protein contains 4 calories per gram).