Men & Vegetables: 'Planned Behavior' Theory May Explain Why Many Guys Shun Veggies

Psychological Theory May Explain Why Guys Shun Vegetables
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young man looking at the salad.

By: Karen Rowan, MyHealthNewsDaily Managing Editor
Published: 08/24/2012 12:39 PM EDT on MyHealthNewsDaily

Men are much less likely to eat their veggies than women, and now researchers say they know part of the reason why.

In a new study, men reported less favorable attitudes than women about the value of eating fruits and vegetables, and men also said they had less control over their fruit and vegetable intake than women did.

The study showed that "men don’t believe as strongly as women that fruit and vegetable consumption is an important part of maintaining health," said study researcher John A. Updegraff, associate professor of social and health psychology at Kent State University in Ohio. It also showed that "men feel less confident in their ability to eat healthy foods like fruits and vegetables, especially when they are at work or in front of the television," he said.

The findings suggest that messages that are effective in encouraging women to eat more produce don't work so well on men. "It's important to help men understand the importance of a healthy diet, as well as to develop confidence in their ability to make those healthy choices, whether it be at work or at home," Updegraff said.

Fruits and vegetables, and beliefs

In the study, Updegraff and his colleagues set out to look at whether an idea in psychology called "the theory of planned behavior" could explain what so many studies have shown — that men are much less likely than women to meet the daily recommendations for fruit and vegetable intake.

This theory looks at the link between people’s beliefs, and their behavior, Updegraff said, and the researchers looked at three beliefs that should motivate people to eat nutritious food: their attitudes toward fruit and vegetables, their feeling of control over their diet, and their awareness that other people want them to improve their diet.

The researchers used data from nearly 3,400 people gathered as part of the National Cancer Institute's Food Attitudes and Behavior survey. The survey, conducted in 2007, included questions aimed at measuring people's attitudes, beliefs and behaviors regarding food. About 40 percent of those surveyed were between 35 and 54 years old.

On the whole, the researchers found that women had more favorable attitudes toward eating fruits and vegetables. For example, women were more likely to agree that if they ate plenty of fruits and vegetables every day, they would look better, and live a longer life.

Additionally, the researchers found that women reported greater confidence in their abilities to eat fruits or vegetables as a snack even when they were tired, really hungry, or around family or friends who were eating junk foods.

Peer pressure doesn’t work

While the theory of planned behavior is well-accepted among most health researchers, the new study is the first to use it to figure out why women consume more fruits and vegetables than men, Updegraff said.

The findings suggest "some fruitful avenues" for improving men's diets, he said.

"What might work best is teaching men ways to take control over their fruit and vegetable consumption," he said. For example, men could be shown options for eating healthy while at work, or how to better include fruits and vegetables in their in-front-of-the-TV snacks.

The study also suggested that one technique isn't likely to get men to eat better: peer pressure. "It turns out that this peer pressure is not a particularly strong motivator, for either men or for women," Updegraff said. In the study, men actually reported greater pressure than women from others around them to eat more fruits and vegetables, but still consumed less.

The study was published online Aug. 13 in the journal Appetite.

Pass it on: Guys who want to eat healthier should focus on the benefits of eating of better, as well as on developing their sense of control over their diet.

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Before You Go

What Is That Vegetable?
Garlic Scape(01 of08)
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A 'scape' is simply the green flower stalk that shoots out of a garlic bulb as it grows. When they are young, green and curled, the scape has a delicious mild garlic flavor and fragrance -- and packs many of the same nutrients as other Allium family foods, such as garlic, leeks and onions. That means it has many of the same protective cardiovascular properties and potential for cancer prevention. (credit:Alamy)
Husk Cherries(02 of08)
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Also known as a ground cherry, this sweet, husked fruit is actually related to the tomatillo rather than the cherry, which means it offers up a healthy dose of the carotenoid lycopene. It is also unusually high in pectin, which has been shown to moderate cholesterol and blood sugar in rats. (credit:shutterstock)
Hen Of The Woods(03 of08)
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This massive mushroom has been used in traditional Chinese medicine for centuries to boost immune system. With its high levels of fiber, amino acids, potassium, calcium, and magnesium -- as well as niacin and other B vitamins, it's no wonder that the 'shroom is relied on in traditional medicine.But Western medicine is also interested in the immune-boosting properties of this mushroom, in the maitake family: a 2009 study found that taking a maitake extract actually improved the immune system of breast cancer patients who were undergoing chemotherapy. (credit: FLICKR: JOI)
Salsify(04 of08)
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This root is also called the "oyster vegetable" because its taste is often compared to the shellfish. Used in soups and stews, salsify is a great source of fiber, vitamin B-6 and potassium, among other nutrients. (credit:Alamy)
Watercress(05 of08)
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This leafy green is actually a superfood, according to the research: a study in the American Journal of Clinical Nutrition found that a daily dose of watercress helps prevent against free radical damage and also helps cells to fight off future damage.It also makes an excellent salad. (credit:Alamy)
Daikon (06 of08)
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This white radish variety from East Asia is rich in anthoxanthin, an antioxidant that some research has shown can lower cholesterol and blood pressure, and improve cardiovascular function, according to Fit Sugar. (credit:Flickr: krossbow)
Kohlrabi(07 of08)
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This often overlooked member of the brassica family (think: broccoli and Brussels sprouts) is packed full of fiber and vitamin C. It's also a rich source of glucosinolates, a group of cancer-fighting compounds. (credit: FLICKR: TILLWE)
Escarole(08 of08)
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These dark, leafy greens are full of folate and beta carotene, making them a nutritional powerhouse choice for salads. And, according to nutritionist Joy Bauer, the salad ingredient is also a surprisingly rich source of vitamin K, which is important for bone health. (credit:Alamy)