sometimes, i learn very valuable stuff on oprah

"Do you know why African-Americans have high blood pressure?" Dr. Oz asks Oprah.

"The reason why African-Americans have higher blood pressure, Dr. Oz, is because during the Middle Passage [when Africans were taken as slaves to America], the African-Americans who survived were those who could hold more salt into their body," Oprah says. "And those who didn't survive were the ones who couldn't hold more salt into their body."