MATERIALS AND METHODS
Rice grain samples (50 mg) were soaked for 24 h at
room temperature and placed in an incubator for the
specified durations. The germinated grains were dried
in a hot-air oven at 100 °C for 30 min. At 13–14%
moisture content16, the grains were then threshed as
germinated brown rice. The germinated brown rice
samples were ground before extracting GABA using
the method of Kitaoka and Nakano17. GABA content
was quantified by spectrophotometry