Research suggests that blood type may be linked to certain health risks. Compared with type O, people with A, B, or AB blood may have a somewhat higher risk of heart disease and blood clots. Some studies have also connected type AB with a greater risk of memory and cognitive problems.
Blood type may also be associated with certain cancers. People with type A, B, or AB blood have been found to have a higher risk of stomach cancer than those with type O, possibly involving differences in how the body interacts with H. pylori bacteria.
However, blood type does not determine your health or guarantee that you will develop a particular disease. It is only one possible factor among many, while lifestyle, regular checkups, genetics, and other health conditions play much larger roles in overall health.
