RBO rich in natural antioxidants
may play a role in reducing the risk of chronic diseases. Phenolic
compounds have demonstrated powerful antioxidative potential
and may reduce free radical-mediated cellular damage. Phytochemical
contents of stabilized cold-pressed RBO as compared to
unstabilized cold-pressed RBO are displayed in Table 5. Results
showed the total phenolic content ranging from 11.59 to 11.27 mg
FAE/g oil, flavonoid content ranging from 9.04 to 12.18 mg CE/g oil
and gamma oryzanol content ranging from 2.03 to 2.25 g/100 g oil.
Stabilized rice bran with domestic heating yielded significantly
higher amounts of total phenolic compounds, flavonoid content,
gamma oryzanol than that of unstabilized rice bran (P < 0.05).
However, steaming stabilized RBO had no significant difference in
flavonoid content when compared with unstabilized RBO (P>0.05).