According to the book "Calories and Protein Intake" published by the World Health Organization, a healthy adult woman needs to consume 1,800 to 1,900 calories a day, while men need 1,980 to 2,340 calories.

The Chinese Nutrition Society proposed the dietary energy reference intake of Chinese residents in 2000 and pointed out that the daily energy requirement of adult male light and medium physical workers is 2400-2700kcal; the daily energy requirement of female light and medium physical workers is Energy is 2100-2300kcal. Infants, children and teenagers, pregnant women and nursing mothers, and the elderly have different physiological characteristics and different energy needs.

If you want to find out your daily caloric intake more accurately, you can refer to the basal metabolic rate announcement (the intake is greater than this number):

Female: BMR = 655 + (9.6 x weight in kg) + (1.8 x height in cm) - (4.7 x age in years)

Male: BMR = 66 + (13.7 x weight in kg) + (5 x height in cm) - (6.8 x Age years )

Extended information:

Heat refers to when the change in the system state comes from the destruction of thermal equilibrium conditions, that is, when there is a temperature difference between the system and the outside world, we It is said that there is thermal interaction between the system and the outside world. The result of the action is that energy is transferred from the high-temperature object to the low-temperature object. The energy transferred at this time is called heat. Heat and work are two different forms of energy transfer that occur during system state changes. They are measures of different forms of energy transfer. They are both related to the intermediate process of state change and are therefore not functions of the system state.

In the process of human life activities, all life activities require energy, such as synthetic reactions of material metabolism, muscle contraction, gland secretion, etc. And these energy mainly come from food. Nutrients contained in animal and plant foods can be divided into five categories: carbohydrates, lipids, proteins, minerals and vitamins, and six categories when added to water. Among them, carbohydrates, fats (fats can also store calories) and proteins can release energy through oxidation in the body. The three are collectively referred to as "energy-producing nutrients" or "pyrogens".

Discovering history: Human beings have been constantly researching and exploring for their own changes. Until around the end of the 19th century. Scientists from various countries have successively discovered that metabolic rate is directly proportional to the surface area of ??the human body, and the special dynamic effects of food have confirmed that the law of energy conservation also applies to the human body. They have compiled food caloric value tables and energy conversion coefficients.

Biochemical reactions: Usually, the average metabolic capacity of each gram of carbohydrates, fats, and proteins in the human body is 4kcal, 9kcal, and 4kcal respectively. At the same time, under normal circumstances, a person's energy intake within 5-7 days is equal to consumption.

General function: Maintain normal body temperature and dissipate heat energy to the outside world.

Normal needs: The Chinese Nutrition Society proposed the dietary energy reference intake of Chinese residents in 2000, stating that adult male light and medium manual workers need 2400-2700kcal daily energy; female light and medium manual workers need 2400-2700kcal. The daily energy requirement is 2100-2300kcal. Infants, children and teenagers, pregnant women and wet nurses, and the elderly have different physiological characteristics and different energy needs.

Deficiency:

The daily energy intake of the human body is insufficient. The body will use its own energy reserves and even consume its own tissues to meet the energy needs of life activities. When people are in a state of hunger for a long time, within a certain period of time, the body will experience a reduction in basal metabolism, reduction in physical activity and weight loss to reduce energy consumption, causing the body to adapt to energy intake. At this time, energy metabolism reaches a new level from a negative balance. balance at a low level. The result is growth stagnation in children, weight loss and reduced work ability in adults.

Excessive manifestation: Excessive energy intake will be stored in the body. The form of energy storage in the human body is fat. Abnormal accumulation of fat in the body can lead to obesity and unnecessary burden on the body, and can become a risk factor for cardiovascular diseases, certain cancers, diabetes and other epidemic diseases.

Food sources: The human body’s energy sources are carbohydrates, lipids and proteins in food. These three types of nutrients are commonly found in a variety of foods.

Cereals and potatoes contain more carbohydrates and are the most economical sources of dietary energy; oil crops are rich in fat; animal foods generally contain more fat and protein than plant foods; the exceptions are soybeans and hard fruits, which Rich in fat and protein; vegetables and fruits generally contain less.

People in need: People who consume a lot of physical energy and need to lose weight should increase or decrease their caloric intake appropriately according to the reference intake.

Supplementation cycle: All people should supplement their daily intake of dietary energy that is balanced with their own basal metabolism, physiological conditions, physical labor, etc.

Remarks: Babies, children and adolescents, pregnant women and lactating wet nurses, patients in the recovery period, etc. who are in the growth and development period still have part of their daily energy intake used for tissue growth and special physiological processes. Changing.

Reference link:

Calorie (word)-Baidu Encyclopedia

Basal metabolic rate-Baidu Encyclopedia