PROBLEM: We learned last year that omega-3 supplements, through some of kind of wonder that the fatty acids work on our DNA, might help counteract the effects of aging on a molecular level. If the ultimate effect of aging is dying, we should hope that omega-3s might help extend life, and their case is strengthened by the fact that they are known to have a protective effect on the heart. Reports that popping fish oil pills doesn't seem to do much to prevent heart disease, however, confuse the issue. So what if we forget about how they got there and just focus on the bottom line: Are people with more omega-3s in their blood healthier?
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METHODOLOGY: A joint effort from the Harvard School of Public Health and the University of Washington analyzed data from 2,700 U.S. adults over the age of 64. All started out healthy, with various proportions of omega-3s in their blood, and were subjected to blood tests and other evaluations over 16 years of follow-up. The researchers compared that initial omega-3 measurement to how long the participants went on living. They also asked the participants -- none of whom took omega-3 supplements -- how much fish they included in their diets.
RESULTS: Having higher levels of blood omega-3s was associated with a 27 percent decrease in overall mortality risk, and with a 35 percent decrease in the risk of mortality from heart disease. All of this was established with blood tests, and it was correlated with how much fish they reported eating.