A normal dietary intake for an adult male is about 2,250 total calories a day, and for a female about 1,800 calories. Different heights, weights, genders, ages, and daily physical activities affect calorie requirements. The body’s daily calorie needs are based on three factors: basal metabolic rate, physical activity and the thermic effect of food. Basal metabolic rate accounts for about 60 to 70 percent of the calories burned in a day. Physical activity is the second most important factor in calorie consumption and includes all the activities of the body. The special kinetic effect of food, also known as the thermic effect of food, is mainly used for the energy required to digest the food eaten. Generally speaking, it is appropriate for adults to consume about 1,800-2,300 calories a day, and discretionary increases or decreases are also needed depending on gender, age and weight. In daily life, it is recommended to have a regular diet and routine, and to exercise appropriately.