Skip to content
My WebMD Sign In, Sign Up

Health & Parenting

Font Size

Can Eating Peanut Butter Cut Breast Cancer Risk in Later Life?

Regular consumption in childhood tied to 39 percent lower odds of benign breast disease by age 30

WebMD News from HealthDay

By Kathleen Doheny

HealthDay Reporter

FRIDAY, Sept. 27 (HealthDay News) -- Eating peanut butter regularly as a preteen and teen girl appears to decrease the risk of developing benign breast disease as an adult, new research has found.

Benign breast disease -- noncancerous changes in the breast tissue -- is a risk factor for breast cancer, experts agree.

The researchers followed more than 9,000 females, beginning when they were aged 9 to 15 in 1996, until 2010, when they were young women. Eating peanut butter three days a week reduced the risk of developing benign breast disease by 39 percent, said Dr. Graham Colditz, senior study author.

"I think this gives us enormous hope there are strategies we could be following to help prevent breast cancer that we haven't capitalized on yet," said Colditz, the associate director for cancer prevention and control at the Siteman Cancer Center at Barnes-Jewish Hospital and Washington University School of Medicine, in St. Louis.

The study, published online Sept. 17 in Breast Cancer Research and Treatment, was funded by the Breast Cancer Research Foundation and the U.S. National Institutes of Health.

Benign breast disease is fairly common, and a known risk factor for breast cancer, Colditz said. Before menopause, "about one in four women have a benign lesion, confirmed by biopsy," he said. "It's very clear there is a strong link between the benign lesion and the subsequent risk of invasive breast cancer."

Depending on the characteristics of the benign lesion, he said, benign breast disease could increase breast cancer risk by threefold.

The study participants were part of a long-term, ongoing study on the health effects of diet and exercise in young people. They filled out questionnaires about their diet annually from 1996 until 2001, then four more times until 2010. They also reported if they had been diagnosed with benign breast disease. In all, 112 women said they had.

The researchers looked at foods with vegetable protein and vegetable fats, then focused on individual foods, including peanut butter, peanuts or other nuts, beans and corn.

A daily serving of any of these foods was linked with a 68 percent reduced risk of benign breast disease. At age 14, a daily serving of any of those foods was linked with a 66 percent lower risk of benign breast disease, and girls who had about three servings a week of peanut butter had a 39 percent lower risk.

The researchers found a link between eating peanut butter and lower breast disease risk, not a cause-and-effect relationship, and Colditz said he can't explain yet why the peanut butter seems protective.

"It could well be the protein," he said. In previous studies, the researchers have looked at other factors of a healthy diet, such as milk consumption, and their role in breast health. The peanut butter finding, he said, is strong, even when taking into account an overall healthy diet. "It's not something we can make go away," he said.

Today on WebMD

Girl holding up card with BMI written
Is your child at a healthy weight?
toddler climbing
What happens in your child’s second year.
 
father and son with laundry basket
Get your kids to help around the house.
boy frowning at brocolli
Tips for dealing with mealtime mayhem
 
mother and daughter talking
Tool
child brushing his teeth
Slideshow
 
Sipping hot tea
Slideshow
Young woman holding lip at dentists office
Video
 
Which Vaccines Do Adults Need
Article
rl with friends
fitSlideshow
 
tissue box
Quiz
Child with adhd
Slideshow