From a Washington Post article today:
"But overwhelming scientific evidence has found major health differences in people who eat more whole grains compared with people who eat refined grains, proving enrichment doesn't make up for the difference:
• Whole grains are our major source of fiber. The grain's outer layer (the bran) keeps us regular and helps prevent hemorrhoids, diverticulitis, and reduces risk for ulcerative colitis (Crohn's disease).
• Whole-grain intake is strongly correlated with reduced cardiovascular disease. This is partly explained by the soluble fiber in grains (oats, rye and barley have the highest levels), which is associated with cholesterol lowering. But other substances in grains, such as antioxidants like Vitamin E, also play a role.
• People who eat more whole grains also have lower body weights, according to epidemiological research. This is attributed to the fiber, which promotes feelings of fullness in foods that are generally low in calories.
• Many studies have shown a strong link between whole-grain intake and reduced incidence of type II diabetes. This may be partly because the fiber in whole grains slows down stomach emptying, causing a lower rise in blood glucose and insulin. Also, whole grains contain nutrients such as Vitamin E and magnesium, which may help improve insulin sensitivity.
• This research is less consistent, but whole grains may also help prevent cancers, especially of the intestinal tract and maybe even breast cancer. Several theories have been put forth explaining the mechanisms. For one, the fiber speeds intestinal transit, which reduces exposure to potential carcinogens. Also, antioxidants enter the circulation through colon cells, providing long-term antioxidant protection through the entire digestive tract, according to Joanne Slavin, a professor in the department of food science and nutrition at the University of Minnesota in St. Paul. Ninety percent of a grain's antioxidants aren't released until they get to the colon, the last stage of digestion, where they may provide maximum protection against cancer.
Interestingly, grains are still a mystery to researchers. They are so complex and full of a multitude of different compounds, scientists are largely unsure of what components of the grain are responsible for the benefits."
FMI, click on
http://www.washingtonpost.com/wp-dyn/articles/A18115-2004Jul27.html
