Sasang constitutional medicine
The Sasang constitutional medicine (Korean: 사상의학; Hanja: 四象醫學) or Sasang typology is a typological constitution medicine within traditional Korean medicine. It was systematized by Yi Je-ma in his book Dongyi Suse Bowon: Longevity and Life Preservation in Eastern Medicine (동의수세보원, 東醫壽世保元) in 1894.
Source: Wikipedia — Sasang constitutional medicine (CC BY-SA 4.0)