Metabolism is generally referred to as basal metabolism, and the basal metabolism of an adult is about 1200-1400kcal per day. Metabolism is a general term for a series of orderly chemical reactions that occur in the human body to maintain life. Basal metabolism refers to the energy consumed by the human body to maintain the most basic metabolism of the human body in a quiet state of rest and wakefulness, and it is about 1200-1400kcal per day in an average adult, but there are slight variations depending on gender, age, height, weight, and other influences. The basal metabolism of the human body can be roughly calculated by the formula: 18-29 years old, male: 15.3 x body weight (Kg) +679, female: 14.7 x body weight (Kg) +496; 30-59 years old, male: 11.6 x body weight (Kg) +879, female: 8.7 x body weight (Kg) +829; over 60 years old, male: 13.5 x body weight (Kg) +487, female: 13.5 x body weight ( Kg) +487 for men and 10.5 x BW (Kg) +596 for women. In case of metabolic abnormalities it is recommended to visit a hospital.