Skip to content
My WebMD Sign In, Sign Up

Food & Recipes

Font Size

Fruits, Veggies Have Limits in Boosting Lifespan?

Study shows a benefit, but that tapers off after 5 servings per day

WebMD News from HealthDay

By Dennis Thompson

HealthDay Reporter

TUESDAY, July 29, 2014 (HealthDay News) -- The nutrients in fruits and vegetables are vital to good health and a long life, but only up to a point. Once you've hit five servings of fruits and vegetables each day, additional daily servings don't appear to boost longevity, a new research review suggests.

The human body may only be able to effectively process a certain amount of fruits and vegetables every day, limiting its ability to absorb important nutrients from extra helpings, said the review's senior author Dr. Frank Hu, a professor of nutrition and epidemiology at the Harvard School of Public Health in Boston.

"It is possible that the digestibility of fruits and vegetables and the availability of nutrients and other bioactive compounds of these foods may have reached a plateau at five servings per day for most people," Hu said. "More research is clearly needed in this area."

Before you reach that five servings a day recommendation, however, the review suggests that the risk of death from any cause drops 5 percent for each additional daily serving of fruits or vegetables consumed. And, the risk of death from heart disease seems to decrease 4 percent for each additional daily serving of fruits and vegetables, according to Hu's research.

However, the study is only designed to show an association between fruit and vegetable consumption and the risk of death during the study periods. It isn't able to prove that eating fruits and vegetables is the cause of the reduced risk.

Still, the research supports dietary guidelines that recommend five servings of fruit and vegetables a day, said Joy Dubost, a registered dietitian in the Washington, D.C., area and a spokeswoman for the Academy of Nutrition and Dietetics.

Dubost said it's pointless to worry about an upper limit at which people gain little or no benefit from fruits or vegetables, given that it's so hard to get people to eat their veggies anyway.

She noted that adults eating an average 2,000-calorie daily diet should eat 2.5 cups of vegetables every day, but instead eat an average 1.6 cups. The same goes for fruit -- adults should eat 2 cups a day, but on average can manage only 1 cup.

"People in general don't even consume the recommended amount of fruits and vegetables," she said. "Instead of focusing on 'is consuming too much not providing additional benefit,' we should be talking about how to get people to eat the recommended amount, given that there are proven health benefits shown in this very study."

For the review, a team of researchers in China and the United States analyzed the results of 16 studies to gain better understanding of the association between fruits and veggies and a person's risk of death. These studies involved more than 830,000 people in total, and more than 56,000 deaths.

Today on WebMD

Four spoons with mustards
What condiments are made of and how much to use.
salmon and spinach
How to get what you need.
 
grilled veggies
Easy ideas for dinner tonight.
Greek Salad
Health benefits, what you can eat and more.
 

WebMD Recipe Finder

Browse our collection of healthy, delicious recipes, from WebMD and Eating Well magazine.



bread
Recipes
soup
Recipes
 
roasted chicken
Recipes
grilled steak
Video
 

Loaded with tips to help you avoid food allergy triggers.

Loading ...

Sending your email...

This feature is temporarily unavailable. Please try again later.

Thanks!

Now check your email account on your mobile phone to download your new app.

vegetarian sandwich
Recipes
fresh vegetables
Recipes
 
smoothie
fitArticle
Foods To Boost Mens Heath Slideshow
Slideshow