People with high levels of niacin, also known as vitamin B3, in their blood may be more likely to have a heart attack or stroke than those with lower levels. Excessive amounts of the vitamin, which is ...

Having vitamin deficiencies can harm your health, but consuming too much of them can also hurt you — specifically, your heart. Researchers with the Cleveland Clinic found having high levels of niacin, ...

A common vitamin called niacin may increase the risk of heart disease, a new study suggests, though complete elimination of niacin from the diet isn’t necessary, and researchers say more regulation ...

Niacin is an important B vitamin that may raise your HDL, ("good"), cholesterol. Find out if you should talk to your health care provider about taking niacin alone or with cholesterol medications.