“For the vast majority of people taking nutritional doses of omega-3s, these data should provide reassurance that there is no meaningful increase in atrial fibrillation risk.” In recent years, several meta-analyses suggested that omega-3 supplements may increase the risk of AF. They did not account for many eligible trials where AF data were available but unpublished, the researchers explained. They may not increase AF risk at all, he added. “Effects of Omega-3 Fatty Acid Treatment on Risk for Atrial Fibrillation: An Updated Meta-Analysis of 35 Trials including 114 592 Individuals.”