Black Americans suffer from high blood pressure twice as high as white Americans. This is also true when comparing Westernized African blacks with African whites. Researchers hypothesize that Westernized blacks suffer from high blood pressure due to two mutual interacted reasons, one is the high salt content of western food; the other is the adaptation mechanism of black genetic genes to the environment.
Considering health care, most African whites also pay attention to controlling salt intake best supports the researcher's hypothesis.