It is well recognized that increasing fiber in your diet not only helps with constipation and colon function, but can also lower the risk for colorectal cancer by diluting fecal carcinogens. However, not all fibers are the same. In a meta-analysis of 25 studies (BMJ, Nov 2011), it was found that only whole grain and cereal fibers were linked with lower risk.

COMMENT: This is an important study since many people get their fiber mostly from fruits, legumes and vegetables. there is no question that eating those types of foods are beneficial and healthy in many ways and are definitely recommended. However, don't forget the cereals and whole grains!