What is the difference between the Eastern human body and the Western human body?

Due to different geographical locations and climatic conditions, Easterners have yellow skin, black hair, and dark eyes. This is all to resist ultraviolet rays, while Westerners have white skin and yellow eyes. Hair, blue eyes, because they don't need protection from UV rays. Therefore, the nutrients required by the body are very different between Eastern and Western people. It is the so-called water and soil that nourishes a person.