Abstract

AbstractDietary fiber and resistant starch (RS) play a key role in suppressing the increase in blood glucose levels. Whole grains such as brown rice (BR) which have a higher content of dietary fiber and important nutrients, are common products used for the maintenance of human health. The higher RS content in BR is suggested to contribute significantly to blood glucose level maintenance in cooperation with dietary fiber. We aimed to enhance the RS levels in BR using supercritical carbon dioxide (scCO2) processing which is typically undertaken by the reactor packed with BR and filled carbon dioxide in a state of supercritical fluids developed with above critical temperature and pressure, and a suitable operating duration as an alternative to conventional methods. This innovative process expectedly enhanced the RS content, promoted gelatinization, and eliminated the foul odors causing appetizing control. In addition, this processing method is highly effective for the removal of pollutions such as pesticides and inactivation of microbial contaminants in food. Therefore, scCO2 processing is a promising alternative to conventional methods.Practical ApplicationProcessing RS in cereals using scCO2 is an innovative alternative to conventional processes such as heat‐moisture treatment and annealing, autoclaving and retrogradation cycles, high hydrostatic pressure, and extrusion that are commonly used to promote RS formation in food products to improve human health and consequently contributes to the control of blood glucose levels after a meal. The innovative scCO2 process is considerably simple, easily operable, and environmentally friendly and safe due to the use of nontoxic CO2 as a solvent. This process has great potential for application in the extraction of pesticides and fats and the inactivation of microbes in food products. Therefore, scCO2 processing will be useful as a food processing method that helps maintain human health.

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