High-fiber diet linked to lower colon cancer risk

Eating a high-fiber diet is linked with a reduced risk of colorectal cancer, according to new research that analyzed 25 different studies. Total fiber intake, as well as fiber from whole grains and from cereals, was most strongly linked with a reduction in colorectal cancer risk, the researchers say.

Overall, the link found between fiber intake and risk reduction was small. Aune’s team found a 10% risk reduction in colorectal cancer for each 10 grams of fiber eaten a day. However, the more fiber people ate, the more risk reduction was found.

The amount of fiber eaten by those who had the highest and lowest levels varied from study to study. When the researchers compared groups with the lowest fiber intake with those who ate more, they found each 10-gram a day increase in total fiber and cereal fiber was linked with a 10% reduction in colorectal cancer risk. The protective effect was seen no matter what the starting point was for fiber, he says. “If you have a low intake, like 5 grams a day, and increase it to 15, it will have an effect, too.” In terms of risk reduction for colorectal cancer, however, he says, the more fiber, the better. Read more…

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