Omega-3 Fatty Acid Supplements

In a very interesting study, James O'Keefe and his colleagues studied whether Omega-3 fatty acid supplements would have a direct effect on the heart. (J Am Coll Cardiol 2006:48(8)1600-1606)

They gave either placebo or Omega-3 fatty acids to 18 men who had previously had heart attack and decreased function of the heart. Each group took the supplements for 4 months and then the pills were switched in what is known as a crossover study design. Multiple measurements were taken on all the participants at the end of each 4 month period.

Dr. O'Keefe and his group found that those men taking the Omega-3 fatty acid supplements had a decrease in heart rate at rest and improved recovery of heart rate after one minute of exercise. No significant changes were found between the groups in any of the blood tests that were performed.

Research shows that a higher resting heart rate (especially in men) is linked with heart attack and death. The researchers in this study show a similar decrease in heart rate as with studies using beta-blockers.

What this means for you

We know that eating foods rich in Omega-3 fats is good for you. This is another small research study that points to taking supplements as having similar effects.

First posted: May 3, 2006