Does the body process fatty acids from fish oil capsules and fish in a similar way? To 
investigate, Dr. William S. Harris, at the University of South Dakota in Sioux Falls asked women to eat two servings of tuna or salmon each week, while other women took in the same amount of omega-3s, an estimated 485 milligrams daily, in capsule form. After four months, the amount of omega-3 fatty acids in the red blood cells of women had risen by a similar amount in both groups. Apparently it did not make much of a difference whether the healthy omega 3 fatty acids came from a capsule or from fish.