Researchers at the University of Reading, England carried out a double-blind, placebo-controlled human feeding study to explore the potential beneﬁts of eating a whole maize (corn) cereal daily. For 21 days, they oﬀered 32 healthy adults either 48 grams a day of a whole grain corn ceeal or an equal amount of a non-whole-grain cereal placebo, in a cross-over fashion, with a 3-week washout period in between. Fecal biﬁdobacteria levels increased signiﬁcantly after 21 days of whole grain cereal, as compared to the reﬁned grain cereal, leading researchers to conclude that whole grain corn can cause a “biﬁdogenic modulation of the gut microbiota” – an increase in beneﬁcial gut bacteria.
British Journal of Nutrition. Nov 2010; 104(9):1353-6 (Epub May 21, 2010)