This paper described and discussed the important literature and ideas about the concepts,types and measurement of body constitution,in terms of healthy,sub-healthy and disease status.In view of traditional Chinese medicine,‘‘healthy”state is a status of relative balance of Yin and Yang to keep our bodily homeostasis.If there are significant physical and/or psychological stressors,such as loss of a beloved one and failure in study or work,the body can no longer keep its own bodily condition balanced and subsequently enter a state of‘‘sub-health”(sub-optimal health).‘‘unhealthy”body constitution such as‘‘Dampnessheat”,‘‘Cold-dampness”and‘‘Heat-or Cold-dryness”with a subnormal body temperature and humidity and clinical manifestations such as insomnia,malaise and overweight will be presented.Immediate,appropriate strategies such as modification of life-style and seeking medical treatment can prevent evolution of an illness.Otherwise,the body will enter a disease status with a‘‘pathological”body constitution of‘‘Yin or Yang deficiency’’,‘‘Blood-stasis”and/or‘‘Phlegm-dampness”.To be complimentary with health promotion and disease prevention in Western medicine,understanding about an individual’s body constitution,together with its determinants(e.g.,healthy eating and lifestyle behaviors),can contribute to a more proactive,holistic and individualized healthcare.