The ash content, protein content and crude fat were found to be significantly (p < 0.05) higher in the stabilized rice bran compared to the URB (Fig. 1). MTRB had low ash content, low fat content and high protein content than PRB. The higher fat content in parboiled samples might be due to increased extractability of PRB; reflected in high value of measured crude fat. Parboiling makes bran surface more permeable to flow of oil and decreases the affinity of oil for solid surfaces of bran which ensure the increase yield of oil (Amarasinghe and Gangodavilage, 2004). In case of MTRB, high crude fat content over URB bran could be attributed to the agglomeration of bran particles to form bran pellets during microwave treatment, which enhanced the extractability of the oil. The results corroborates to the earlier reports (Tao et al., 1993). Protein content of MTRB was found to be slightly higher than URB and PRB. Protein content was determined on wet basis. Therefore, the differences in protein content among URB, PRB and MTRB might be attributed to variability in moisture content of respective samples. The findings agreed with the earlier findings of Malekian et al. (2000), who reported that microwave stabilization did not significantly change the contents of protein rice bran.