Your blood group can have a bearing on your chances of developing heart disease, say researchers from the Harvard School of Public Health in Boston.
People with blood types A+, B+, or AB+ are at a higher risk of heart disease as compared to those with blood type O+.
Those with blood group AB+ have a 23% higher chance of developing a heart condition compared to an 11% increased risk for type B+ and 5% for type A+, they report in an American Heart Association journal.
Going by the findings, a third of India's population has some protection against heart disease since blood group O+, with blood group B+, is found in one in three people, according to Indian Red Cross Society data.
"Blood group B+, however, is present in almost one in two people in north India," says Dr SP Agarwal, secretary general, IRCS.
Globally, blood groups O+ and A+ are the most common, followed by B+ and AB+.
One in three adult deaths in India are caused by heart disease.
Studies have linked blood type AB+ with inflammation, which causes artery damage, and A with high bad cholesterol that narrows and hardens arteries. These factors impede blood flow and can starve the heart of blood, causing a heart attack.
A healthy lifestyle is a must irrespective of blood type, say senior cardiologists.
"You can't do anything about your blood group, but you can choose to eat healthy, get active and not smoke," said Dr Ravi Kasliwal, chairman of preventive cardiology, Medanta, the Medicity.