Slow metabolism may be manifested by a lack of inclination to exercise, laziness, possible weight gain, fear of cold, and slower reflexes. Slow metabolism can be seen in aging, hypothyroidism and so on. Slow metabolism may be related to physiological factors, such as ageing will lead to a gradual slowing down of the body’s metabolism, and at the same time the gastrointestinal digestive function will be slowed down, which will easily lead to weight gain; it may also be related to pathological factors, such as hypothyroidism, and there will be chills and fatigue and other symptoms. Thus, slow metabolism may be a normal physiological phenomenon, or it may be related to hypothyroidism and other diseases, if the symptoms are more serious, we should pay attention to it and consult a doctor in time.