The B blood group is one of the four main blood types in the ABO blood group system, characterized by the presence of the B antigen on the surface of red blood cells. Individuals with this blood type can have either B or O type blood as their plasma type, which means they can receive blood from B and O blood groups during transfusions. People with the B blood group are known to have specific dietary and health traits. Some studies suggest that they may have a stronger immune response and a lower risk of certain diseases. However, these claims require further research for validation.