Research published in the International Journal of Vitamin and Nutrition Research (2010; 80(2): 107-16) looked at fish oil supplementation and its effect on triglyceride levels. The double-blind, placebo controlled study involved 124 subjects over the age of 65. Participants were given either a placebo or one gram of fish oil per day for six months. At the end of the trial, there was a significant reduction in the triglyceride levels in the fish oil group when compared to the control group.