As shown in Table 3, TP content is higher in conN than in conG and higher in 30BFN than in 30BFG. This observation indicates that addition of 10% oat b-glucan resulted in significant increase (p < 0.05) in TP content of noodle. According to White and Xing (1997), oat bran exerted a moderate antioxidative activity and ferulic acid is the most abundant phenolic compound formed in oat flour. The outer layers of grain have greater concentrations of TP than have extracts from other milling fractions. Thus, oat b-glucan extracted from oat bran has a greater concentration of TP and consequently increases the amount of TP in noodles.