Sasang constitutional medicine (SCM),a unique form of traditional Korean medicine,classifies human being into four types: TaeYang (TY),SoYang (SY),TaeEum (TE),and SoEum type (SE),according to (Ⅰ) physical features,(Ⅱ) psychological characteristics,(Ⅲ) susceptibility to certain health problem patterns,and (Ⅳ) response to certain herbs and medicines.