Results published in the journal Circulation indicates that individuals with high levels of omega-3 fatty acids such as EPA and DHA (mostly found in fish oils) have a lower risk of atrial fibrillation, a type of heart rhythm disturbance that often requires medication. Dariush Mozaffarian, MD, from the Harvard School of Public Health, says. "Given the aging of the population, the significant and growing public health burden of atrial fibrillation, and the limited treatment options once this heart condition develops, our results highlight the need to investigate atrial physiological and arrhythmic mechanisms affected by total and individual omega-3 fatty acids and to test their efficacy for preventing new onset of atrial fibrillation among older adults."