Your blood type and its connection to your heart is more important than you think. Here's what it may mean for your health.

Blood types are determined by antigens -- a substance that triggers an immune response -- on the surface of red blood cells. There are ABO antigens, which designate ABO blood types. This is ...

In cases of questioned paternity, ABO blood-typing can be used to exclude a man from being a child's father. For example, a man who has type AB blood could not father a child with type O blood ...

New research suggests that blood group B may be associated with slower aging, although not without risks for these people.

What Is the Blood Type Diet? The idea behind the Blood Type Diet is that we all have different nutritional needs depending on our blood type — O, A, B, or AB. According to the Blood Type Diet ...