Why Everyone Should Know Their Blood Type

. However, researchers are quick to point out that lifestyle factors like weight, smoking, and diet, which, unlike blood type, are modifiable, have a much greater impact on heart disease.


When Harvard scientists analyzed more than two decades of data on more than 77,000 people, they found that those with AB blood had a 23 percent increased risk for heart disease compared to people with type O blood. Those with type B blood had an 11 percent higher risk and those with type A blood had 5 percent greater risk. Researchers aren’t sure why, but posit that type A blood is associated with LDL cholesterol and that type O blood, which is associated with reduced risk, may contain a chemical that boosts blood flow and prevents clots. Learn more about


Danish researchers have studied how blood type interacts with a genetic predisposition for deep-vein thrombosis (DVT), or blood clots in the lower legs that can travel to the lungs and become life-threatening. After analyzing data on about 66,000 people over more than 30 years, they found that those with type AB, A, or B had a 40 percent higher risk of DVT than people with type O, the most common type. When the scientists did further analysis to see which factors have the biggest impact on DVT risk on a population level, they found that an AB blood type contributed to about 20 percent of blood clots; genetic mutations accounted for 11 percent, being overweight accounted for 16 percent, and smoking accounted for 6 percent, reported


Potentially a lot, according to several studies that correlate different blood groups with everything from risk of heart disease to infertility. While none of these studies are conclusive about cause and effect (they can’t say X blood type causes Y disease) and any increased risks are still pretty small, the research does highlight the importance of knowing your type—A, B, AB, or O—and how it could affect your well-being. Plus, here’s the


What’s the difference between 
your brain and the brain of someone who can remember hundreds of words OR numbers? Just a few tricks and a little bit of mental training.