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Eat Fish, Live Longer?
Date:4/2/2013

By Kathleen Doheny
HealthDay Reporter

MONDAY, April 1 (HealthDay News) -- Regularly eating fish rich in omega-3 fatty acids might lengthen your life, new research suggests.

A study of more than 2,600 older adults found those with the highest blood levels of omega-3 fatty acids -- found in salmon, mackerel, herring, lake trout and albacore tuna -- lived more than two years longer on average than those with lower blood levels.

"This is not a study of fish oil supplements, it's a study of blood omega-3 levels related to diet," said researcher Dr. Dariush Mozaffarian, an associate professor of epidemiology at the Harvard School of Public Health in Boston.

The study, published April 1 in the journal Annals of Internal Medicine, doesn't prove that eating fish will increase longevity, but it does suggest a connection.

"Blood levels of omega-3s are related to lower risk of death, especially cardiovascular death," Mozaffarian said.

Mozaffarian found that people with the highest levels of omega-3s reduced their overall risk of death from any cause by up to 27 percent compared to those with the lowest levels. And they had about a 35 percent lower risk of dying from heart disease.

Fish contains heart-healthy protein and fatty acids, and other studies have found diets rich in fish lower the risk of heart disease death. But the effect on death from other causes has not been clear, Mozaffarian said.

Rather than relying on self-reported intake as some other researchers have, Mozaffarian's team measured actual blood levels of the fatty acids.

At the study's start, the researchers analyzed blood samples, did physical exams and asked about lifestyle. None of the participants, who were 74 years old on average, took omega-3 supplements at the time.

During the 16-year follow up, 1,625 people died, including 570 from cardiovascular causes. The higher the omega-3 blood levels, the lower t
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