Can taking aspirin regularly help prevent breast cancer?

There is insufficient evidence that a regimen of low-dose aspirin can prevent breast cancer, and it poses risks, including severe bleeding episodes. So, unless more evidence comes to light, experts say it’s too early to recommend the use of low-dose aspirin for this purpose. Until a few years ago it seemed that low-dose aspirin therapy held potential for breast cancer prevention, but three major studies that came out in 2018 changed that picture. Studies have also suggested against the use of aspirin therapy for primary prevention of cardiovascular disease because of bleeding risks.