Germinated brown rice is a good source of the phenolics associated with antioxidant effects. Germination
significantly increased by 63.2% and 23.6% the total phenolic and flavonoid contents, respectively. The
percentage contribution of bound phenolics to total was 42.3% before and decreased slightly to 37.6%
after germination. The percentage contribution of bound flavonoids to total, 51.1%, was the same before
and after germination. The change in the amounts of free and bound forms indicated that transformations
could occur during the germination process. Six individual phenolics were detected by HPLC. The levels of
ferulic, coumaric, syringic, and caffeic acid significantly increased. The ratio of bound ferric reducing
antioxidant power to total was basically constant, while germination increased the ratio of bound oxygen
radical absorbance capacity to total. This indicated that the increase of bound phenolics exerts beneficial
health effects throughout the digestive tract after absorption and may reduce mutations.