Omega-3 Fatty Acids

Also known as: fish oils, eicosapentaenoic acid (EPA)/docosahexaenoic acid (DHA), alpha-linolenic acid (the plant version of omega-3).

Potential uses: To possibly reduce the risk for breast, colon, or prostate cancers.

Usual dose: You can get omega-3 fatty acids from fatty fish such as salmon, tuna, sardines, and mackerel, as well as walnuts, soy foods, and flaxseeds. (About two to three servings a week is best.) Fish oil capsules are also available.

Are there any risks? If you consume three or more grams per day of omega-3 fatty acids, you may increase your risk of bleeding. Other side effects include stomach upset and low blood pressure. When consumed as part of regular portions of food (not through supplements), these side effects are rare.

What does the research show? In studies done in animals, the results suggest that omega-3 fatty acids may increase the ability of chemotherapy medicines such as doxorubicin and epirubicin to kill cancer cells. Studies show that the average U.S. diet is low in omega-3 fatty acids.