A low-dose daily aspirin doesn’t lower the risk of dying or having a heart attack or stroke in healthy older people. In fact, it may raise the risk of bleeding or dying, especially of cancer. Researchers randomly assigned 19,114 healthy Australian and U.S. residents aged 70 or older (65 or older for U.S. blacks and Hispanics, who have a higher risk of heart disease) to take either a daily enteric-coated aspirin (100 milligrams) or a placebo.