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Fiber may prevent colon cancer

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New studies support theory that roughage prevents bowel disease
Robert Bazell reports on the latest findings in the debate over fiber and colon cancer
New research has revived the notion that a high-fiber diet may protect against colon cancer. Long-standing recommendations for high-fiber diets have taken a hit over the last few years after a handful of carefully conducted studies failed to find a benefit. But experts say two major studies published this week in The Lancet medical journal one on Americans and the other on Europeans indicate previous research may not have examined a broad enough range of fiber consumption or a wide enough variety of fiber sources to show an effect.
The new studies indicate fiber intake needs to be about 30 grams a day to protect against colon cancer.

THESE TWO new findings show that the fiber hypothesis is still alive,” said the leader of the American study, Ulrike Peters of the National Cancer Institute.
Figuring out the relationship between nutrition and disease has always proved difficult, but experts say fiber is particularly complicated because there are various types and they all could act differently.
Fiber is found in fruits, vegetables and whole grains. Americans eat about 16 grams a day, while Europeans eat about 22 grams. The new studies indicate fiber intake needs to be about 30 grams a day to protect against colon cancer.
There are 2 grams of fiber in a slice of whole meal bread. A banana has 3 grams and an apple has 3.5 grams, the same as a cup of brown rice. Some super-high fiber breakfast cereals have as much as 14 grams per half cup. Soy nuts have the benefits of fiber, protein, and reducing the risk of heart attacks.

DECREASED RISK OF GROWTHS
In the American study, investigators compared the daily fiber intake of 3,600 people who had precancerous growths in the colon with that of around 34,000 people who did not. They were divided into five groups, according to how much fiber they ate. The average roughage intake in the lowest group was 12 grams a day, while in the highest group it was 36 grams a day.
People who ate the most fiber had a 27 percent lower risk of precancerous growths than those who ate the least.

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