Your blood type matters Unless you've recently given blood, you may not think much about your blood type. The presence or absence of certain molecules called A or B antigens, as well as a protein ...

Many Americans don't know their blood type, but that knowledge can actually tip you off about your risk for certain medical ...

Not to B-negative, but your blood type could offer a clue to your risk of having a stroke before 60. “The number of people with early strokes is rising,” said Dr. Steven J. Kittner, co ...