Is there an effect of other dietary substances such as fiber that can reduce one's risk to cancer. There are two kinds of fiber.
Soluble fiber is digested by bacteria normally present in the gastrointestinal tract.
But insoluble fiber such as cellulose, present in many types of fruits and vegetables, is not digested but it does play a very beneficial role in that it can bind to any estrogen that passes from the liver to the intestine. A lack of fiber in the diet, therefore, can result in carcinogenically dangerous forms of estrogen being reabsorbed back into the bloodstream from the gastrointestinal tract.