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Study Shows Healthy Eating Habits Lengthen Life

Posted: June 29, 2009

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Kant's team asked the participants about six components of a healthy diet, including intake of fruits, vegetables, low-fat dairy, whole grains, lean meat and poultry, and fat. People didn't have to eat perfectly to get a top score, she said. For instance, "if a person had five or six servings of vegetables a week, that would get them the top score [for that question]."

"It's not that you have to do everything [recommended under the dietary guidelines] to have any health benefits," she said, noting that participants in the groups with lower (but not the lowest) scores also tended to live longer. For instance, women who were in the second-from-the-highest group on dietary scores were 20% less likely to die and men in that group were 17% less likely. The study is published in the July issue of The Journal of Nutrition.

Good dietary habits may also help delay the progression of hardening of the arteries, according to a separate study published in the July issue of the The American Journal of Clinical Nutrition. Researchers from Tufts University and Wake Forest University evaluated the effect of a good diet on the progression of coronary artery disease in 224 postmenopausal women who had the disease when they enrolled in the estrogen replacement and atherosclerosis Study. The better the diet, the slower the progression of disease, they found.

"Both studies are finding similar things," said Penny Kris-Etherton, a distinguished professor of nutrition at Penn State University, who wrote an editorial to accompany the atherosclerosis study. "We're getting more and more evidence that diet [when poor] can play a key role in chronic disease development, progression and all-cause mortality," she said.

Will the findings—especially the fact that those who got the top benefit didn't eat perfectly—inspire people? "As a nutritionist, you try to be optimistic and hope so," Kris-Etherton said. "But society sometimes makes it difficult. We live in an environment where there are so many food choices that aren't consistent with our [dietary] guidelines."