Post by Audrey Carlsen, The Salt at NPR Food (4/1/13)
Now here's some more good news: A study published Monday in the Annals of Internal Medicine suggests that eating oily fish once or twice a week could maybe – just maybe — add a few years to your life.
Oily fish like salmon, trout and herring are, of course, a good source of omega-3 fatty acids, which are essential to numerous bodily functions. Researchers at Harvard School of Public Health and the University of Washington wanted to know how eating fish high in omega-3s affected health. So over the course of 16 years, they monitored a group of almost 2,700 healthy adults aged 65 years or older.
But unlike most studies that have looked at the question, the researchers didn't want to rely on study subjects to accurately recall what they ate, so they measured blood levels of omega-3s instead. And since they were interested in dietary intake only, they excluded participants who took fish oil supplements.