Do you know your blood type?
Unless you’ve donated blood, were given a transfusion or found out during pregnancy, maybe you’ve never thought twice about it. But coursing through your veins every second of every day are tiny variations that categorize your blood into one of these groups: A+, A-, B+, B-, O-, O+, AB+ and AB-.
Ongoing research into blood type suggests it may matter more than we give it credit for — at least when assessing risk for certain health conditions, especially heart disease. These invisible differences in the blood may give some people an