A normal adult needs about 60 to 90g of protein a day. However, the amount of protein needed may vary slightly according to gender, health level and age. Protein is usually found in foods such as eggs, dairy, fish, meat and soy products. In general, a normal adult needs about 60 to 90g of protein a day to satisfy the body’s needs. But for the growth and development of children, pregnant women and other groups of people, need to relatively increase the intake of protein, generally need 1.5g per kilogram of body weight per day. But for the elderly, renal insufficiency and other patients, the amount of protein needed per kilogram of body weight per day 0.6 ~ 0.8 g. For regular exercise or athletes, the demand for protein is higher, about 1.5 ~ 2.0 g per kilogram of body weight per day. If the body has a protein deficiency, it is recommended to go to a regular hospital in time to check, with the help of doctors to identify the causes, standardized treatment.