Nutritional quality of rice bran protein in comparison to animal and vegetable protein

In Sprague-Dawley rats, RBP showed protein efficiency ratio, net protein ratio, net protein utilisation, and biological value of 2.39, 3.77, 70.7, and 72.6, which were comparable to the qualities of animal proteins. The true digestibility of RBP (94.8%) was significantly higher than that of REP (90.8%), ISP (91.7%) and WPI (92.8%) and the same as that of casein. Protein digestibility corrected amino acid score (PDCAAS) of RBP was 0.90. These results suggest that rice bran protein appears to be a promising protein source with good biological values and digestibility.