When we do not have enough calories from food intake, the body itself will produce calories, and adipose tissue is an intrinsic source of energy. When we do not have enough calories from food intake, the body itself will produce calories, and such endogenous calories mainly come from hepatic glycolysis and lipolysis: 1. The fatty acids can be turned into ketone bodies (Ketone), which are used by cells (including nerve tissue). Therefore, when a person with a lot of subcutaneous fat (obese), adipose tissue is an inherent source of energy that can be broken down to supply the body with the calories needed for metabolism, but generally speaking, at least 800 calories a day is still needed to not damage health. Note: Calorie: also known as a capital “C”. Most commonly found in food labeling, it is equivalent to the energy required to raise 1 kilogram of water at 15 degrees Celsius by one degree under a standard atmospheric pressure, 1 calorie = 4.185 joules; small calorie: also known as “cal” is more often found in scientific research documents, 1000 small calories = 1 large calorie. We often talk about how many calories to eat at each meal, but how many calories do you need daily? You can calculate the daily calorie requirement according to your gender, age, height and weight, the following is the calculation: Men: [665 + 1.38 x weight (kg) + 5 x height (cm) – 6.8 x age] x activity Women: [665 + 9.6 x weight (kg) + l.9 x height (cm) – 4.7 x age] x activity Activity: the average person’s activity level varies from 1.1 – 1.3, usually only sit in the office work of women, activity is about 1.1, high exercise is about 1.3. For example: height 163cm, weight 51kg of 26-year-old women, the daily calorie requirements for 1475.87Kca|. Formula: (665 + 9.6 x 51 + 1.9 x 163 – 4.7 x 26) x 1.1 = 1475.87Kca| Calories and basal metabolic expenditure In general, adults need at least 1500 calories of energy per day to maintain bodily functions, because even if you lie still, your body still needs energy to maintain body temperature, cardiorespiratory function and brain functioning. Basal metabolic expenditure varies among individuals depending on height, weight, age, and gender. Calories and weight loss Controlling calorie intake and exercising properly is a fairly effective way to lose weight, and is seen by most physicians as the healthiest way to lose weight. The mechanism is fairly simple: when daily energy intake is not enough to provide the body with energy expenditure, the body calls upon its internal stores of sugars and fats, and the weight loss process begins when the fats are broken down and provide the body with energy. It is important to note that the control of calorie intake should be gradual to ensure that the body can adapt diffusely, and at the same time, the daily calorie intake is generally not less than 800 calories, otherwise the body will compensate for the lack of energy intake by reducing body functions, which usually results in dizziness and weakness, and the reduction of basal metabolic consumption also affects the efficiency of weight loss at the same time. Dietary habits need to be adjusted slowly, since fat does not accumulate in a day, naturally it should not be possible to drop quickly. The right way to prevent rebound is to control your diet correctly. Here is an additional exercise calorie consumption table to see what “price” you have to pay if you can’t “keep your mouth shut”.