A meta-analysis of studies conducted between 1965 and 2010 in humans strongly suggests that the consumption of foods rich in cereal fiber or mixtures of whole grains reduces the risk of obesity, diabetes, and cardiovascular disease. However, the term "whole grain" may refer to any mixture of bran, endosperm and germ one would expect in an intact grain. These grains are often processed (refined) before being incorporated into foods and have lower fiber and nutrient levels.
PositiveTip: When looking for healthy grain products, make sure they are high in fiber, or are made from intact grains.