Roughly 3 grams of omega-3 fatty acids each day, in food or supplement form, may be the optimal amount needed to help lower blood pressure, a review of the research shows.
The analysis of dozens of studies, published Wednesday in the Journal of the American Heart Association, looked at the relationship between blood pressure and two omega-3 fatty acids – docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) – which are found in seafood such as salmon, tuna, sardines, trout, herring and oysters. DHA and EPA can also be taken together in supplement form.

While previous research suggests omega-3 fatty acids might help lower blood pressure, the amount needed to do so has been unclear.