A three-year world-first study has found that a common cruciferous vegetable eaten by millions every day could prevent and treat one of the nation's biggest killers. In pre-clinical trials, the study confirmed a natural chemical found in broccoli can reduce the formation of harmful blood clots that can in some instances lead to stroke, as well as improve the performance of clot-busting drugs afterwards. About 85% of strokes are caused by the formation of a harmful blood clot in the brain (also known as acute ischemic stroke). "After a patient has an ischemic stroke, they are treated with tissue plasminogen...