Clinical studies of heart attack survivors have found that daily omega-3 supplements dramatically reduce the risk of triglycerides, help correct abnormal heartbeats, and can help prevent clog arteries. Promotes Cardiovascular Health & Protects Against Heart Attack and Stroke Fish oil continues to grow in scientific credibility as a key component to heart health. According to the American Heart Association, fish oil is effective in reducing the incidence of heart disease and helps to reduce risk factors like high cholesterol and high blood pressure.