Colorful vegetables, fruits may protect against colon cancer

Researchers say they have found that a diet rich in colorful vegetables and fruits may contain compounds that can stop colon cancer and inflammatory bowel diseases in pigs. Understanding how these compounds work on a molecular level could be an initial step toward finding treatments for people with cancer, they said.

“What we are learning is that food is a double-edge sword — it may promote disease, but it may also help prevent chronic diseases, like colon cancer,” said Jairam K.P. Vanamala, associate professor of food sciences, Penn State, in a news release. “What we don’t know is, ‘how does this food work on the molecular level?’ This study is a step in that direction.”

The findings, reported in a recent issue of the Journal of Nutritional Biochemistry, suggest that eating whole foods that contain macronutrients — substances that humans need in large amounts, such as proteins — as well as vitamins, carotenoids and flavonoids, may be effective in reducing inflammation, which is often linked with colon cancer.

Vanamala said these findings reinforce recent research that suggests cultures with plant-based diets tend to have lower colon cancer rates than cultures with meat-based diets. Colon cancer is the second-leading cause of cancer-related deaths in the United States and a leading killer in many other Western countries, which tend to include more meat and less fruits and vegetables, he added.

Bioactive compounds

While the researchers used purple potatoes in this study, Vanamala said other colorful fruits and vegetables could prompt similar effects. Colorful plants, including the purple potato, contain bioactive compounds, such as anthocyanins and phenolic acids, that have been linked to cancer prevention.

“For example, white potatoes may have helpful compounds, but the purple potatoes have much greater concentrations of these anti-inflammatory, anti-oxidant compounds,” said Vanamala. “We use the purple potato as a model and hope to investigate how other plants can be used in the future.”

Another advantage of using whole foods for cancer treatment is that it would benefit the agriculture industry and likely help small farmers around the world.

“If this model works, we can see what works in other countries,” Vanamala said. “Instead of promoting a pill, we can promote fruits and vegetables that are very rich in anti-inflammatory compounds to counter the growing problem of chronic disease.”

 

 

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Truman Lewis
A former reporter and bureau chief, Truman Lewis has covered presidential campaigns, state politics and stories ranging from organized crime to environmental and consumer protection.