Fish oil and blood pressure

Fish or fish oil supplements that contain relatively high doses of omega-3 fatty acids may lower blood pressure by small amounts in people who have high blood pressure.

A good way to get omega-3 fatty acids is to eat oily fish at least 2 times a week. These fish include tuna, salmon, mackerel, lake trout, herring, and sardines.

You may also take fish oil supplements. But fish oil pills also can cause side effects such as gas and belching and an unpleasant, fishy taste in the mouth. Little is known about the possible long-term effects of taking fish oil supplements.