How Chinese Medicine Explains the Human Body Constitution (Part 3: The Nine Constitutions of Modern Times)
The concept of TCM constitution begins with the theory of yin and yang in TCM. The "Five Types of People" from the "Huangdi Neijing" are: Yang Type, Shaoyang Type, Balanced Type, Shaoyin Type, and Taiyin Type. and then extends through the "five elements of people: wood, fire, earth, metal, and water" of the Five Elements Theory.