lipid peroxidation by lipases and lipoxygenases is thought to be the primary cause for bran degradation. Two main changes, oxidative rancidity and hydrolytic
rancidity affect the quality of RBO. So Heat treatment is the most common method to stabilize rice bran. High temperatures above 120 C denature the enzyme responsible for lipid degradation in RBO without destroying the nutritional value of the rice bran.