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Study reaffirms that five servings of fruits and vegetables can extend life

How many times will we have to be told? Apparently we haven't reached the point when we'll change our habits, but here goes again: Eating five servings of fruits and vegetables every day can help us live longer.

That comes from researchers' analysis of 16 studies covering 833,234 people, published recently in the medical journal BMJ.

Scientists from China and the United States looked at the growing evidence of a connection between produce consumption and heart disease and cancer. They wanted to quantify the "dose response" — or how much we need to eat — in relation with all causes of death, heart disease and cancer.

The average risk of death from all causes was reduced by 5 percent for each additional daily serving of fruits or vegetables; risk of cardiovascular death was reduced by 4 percent for each serving. They did not find the risk of cancer to be appreciably associated with produce consumption.

This conclusion differs from a finding published recently in the BMJ's Journal of Epidemiology & Community Health, in which researchers led by Oyinlola Oyebode of University College London wrote that people "eating seven or more portions of fruit and vegetables daily have the lowest risk of mortality from any cause."

One of the researchers involved in the more recent study, Wei Bao of the Eunice Kennedy Shriver National Institute of Child Health and Human Development, said his group's analysis did not find additional benefits over five portions.

The studies followed participants for up to 24 years and tallied a total of 56,423 deaths — 11,512 from heart disease and 16,817 from cancer.

Bao said it's possible that there is an optimal dose or particular kinds of produce that would affect cancer death rates.

Andy Bellatti, a registered dietitian, noted that half a cup of cooked leafy greens counts as a serving, as do about a dozen baby carrots or six asparagus spears. But the federal Centers for Disease Control and Prevention reports that only about a quarter of American adults eat vegetables three or more times a day, he said.

The World Health Organization recommended in 1990 that people eat at least five servings of fruits and vegetables a day to protect against cardiovascular disease and some cancers.

Study reaffirms that five servings of fruits and vegetables can extend life 08/11/14 [Last modified: Monday, August 11, 2014 9:26pm]
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