Omega-3 fatty acids are essential nutrients. The human body cannot make omega-3 fatty acids, and therefore they must be present in the diet. Omega-3 fatty acids help control blood clotting and build cell membranes in the brain; adequate intake is associated with lower risk for heart disease and stroke. There is increasing evidence omega-3 may also benefit those with menstrual pains, lupus, Raynaud syndrome, depression and rheumatoid arthritis.
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