The addition of MPP can significantly decrease the retrogradation in both the NRF and GRF, but there were no changes on the peak viscosity and pasting temperature. The MPP also increased the functional properties of antioxidant by inhibiting lipid oxidation of NRF and GRF during 30 days of storage. The strongly negative correlations between the retrogradation with the TPC, TFC and antioxidant activity were observed, but not with the fiber content. Thus, reducing retrogradation in rice flours may come from the major phenolic compounds presented in MPP, especially gallic acid, protocatechuic acid and rutin, which can form hydrogen bonds and hydrophilic interactions with amylose and amylopectin molecules. Our finding suggests that mango peel, a by-product obtained from mango processing, could potentially be used as an additive in flours and other food products to increase the nutritional value and functional properties for consumer health benefits. However, its effect on the sensory properties and consumer acceptance for practical use will be required further studies.