In March of 2006, research reported in the journal Agricultural Research, Nancy Keim and a team at the USDA ARS Western Human Nutrition Center studied 10 women age 20-45 who ate a whole grain diet for three days, then ate the same foods but with refined grains in place of whole grains. Blood samples at the end of each 3-day period showed that the refined grains diet caused a significant increase in triglycerides and a worrisome protein called "apolipoprotein CIII" (apoCIII), both of which have been associated with increased risk of heart disease.
At the University of Utah, in a study of over 2000 people, a team led by Dr. Martha Slattery found that high intakes of whole grains, such as brown rice, reduced the risk of rectal cancer 31%. They also found that a high-fiber diet, 34 grams or more of fiber per day, reduced rectal cancer by an impressive 66%. The findings were published in the February 2004 issue of the American Journal of Clinical Nutrition.
In a Study presented at American Heart Association Conference, March
children, age 9-15, spent two weeks on an all-you-can-eat diet of whole
grains, fruits, vegetables and lean protein, while exercising 2.5 hours
each day. University of California researchers led by Dr. James Barnard
reported that in just two weeks the children's cholesterol levels
dropped an average of 21%, while insulin levels fell 30%.