Calorie is one of the units used in the measurement of thermal energy, and the caloric one expresses the amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius, of course, under pressure of approximately 101 kPa. The calorific is used to measure the thermal energy needed by the human body to function normally and be able to perform its functions and vital functions. This thermal energy is produced after the burning of nutrients in the human body. Hence, the two main sources of energy in the human body are food And the oxygen that breathes and inhales through his nose and mouth to enter the lungs.
As for the method of calculating calories, it is by knowing the number of calories produced by each food individually and then collect the number of all the calories that a person eat during the day together and then produce the amount of calories that entered the body. The prices of individual foods can be found from special tables or from dietitians where they can provide those interested, and calories are usually found on the packages of foods purchased. However, the basic elements generally contain a number of calories, for example carbohydrates produce an average of 400 calories per 100 grams, and proteins also produce about 400 calories per 100 grams, while fat produces approximately 800 calories per 100 grams For this reason, it is generally recommended that the human diet be an integrated diet containing certain percentages of each of the main food groups. For example, carbohydrates should not exceed 50% of the total daily food intake. Protein should not exceed 35% While fat should not exceed 15%. Also, taking vitamins and vegetables and fruits before eating helps to reduce the intake of carbohydrates and fats significantly, the body needs to specific amounts of calories, and the proportion of calories that the human body usually needs from one body to another as there are multiple factors interfere In determining the most important age. The consumption of calories is due to various activities of the body such as breathing, thinking, heart work, etc. In addition, the body loses kinetic energy through various physical activities.