9 secrets your blood type reveals about you

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 called the Rh factor, determine which of the eight common blood types you have coursing through your veins. (The Australia Red Cross notes that these blood types are: A+, A-, B+, B-, AB+, AB-, O+, or O-.) However, these antigens make a difference beyond just your blood, according to an article published in Blood Transfusion in 2013. They can influence other parts of your body, including blood vessels, neurons and platelets, and as a result, your blood type may be linked to your risk of developing certain diseases.