DNA damage inhibition of red brown rice extracts were tested by photolysing H2O2 with UV radiation in the presence of pGEM-T plasmid D NA and performing agarose gel electrophoresis as described by Kalita et al. with slight modifications[18]. The plasmid DNA samples of 10 µL aliquots were transferred to PCR tubes and added with 10 µL of extracts with different dilutions (20, 40, 60, 80, 100 mg/mL) followed by addition of 10 µL 6% (w/v) H2O2. Positive control was prepared accordingly with addition of 10 µL quercetin in exchange of extracts whereas negative control was without addition of both quercetin and extracts. All the tubes were then placed directly on the surface of UV transilluminator (300 nm) for 10 min. After irradiation, 1 µL of loading buffer was mixed with 5 µL of samples and all samples were analysed by gel electrophoresis on 0.6% agarose gel stained with ethidium bromide in Tris-acetate-EDTA buffer for 60 min at 100 V