Green and ripe mango peel powders (MPP) were added to normal rice flour (NRF) and glutinous rice flour
(GRF) at three levels (400, 800 and 1200 ppm) and their effects on physicochemical properties and lipid
oxidation inhibition were investigated. Overall, MPP increased the breakdown viscosity and reduced the
final viscosity in rice flours when compared to the control. Decreasing in retrogradation was observed in
both NRF and GRF with MPP added of all levels. MPP addition also significantly inhibited the lipid oxidation
of all flours during storage (30 days). Retrogradation values were strongly negatively correlated with
total phenolic and flavonoid contents, but not with fiber content. The hydrogen bonds and hydrophilic
interactions between phenolic compounds with amylopectin molecule may be involved the decrease
of starch retrogradation, especially GRF. We suggest that the addition of MPP not only reduced the retrogradation
but also inhibited the lipid oxidation of rice flour.