Evaluation of bioactive compounds and bioactivities of soybean dried by different methods and conditions

► Isoflavones and bioactivities of soybean dried with hot air, superheated steam and infrared were monitored. ► Drying with infrared led to the highest isoflavones content and bioactivities of soybean. ► Higher drying temperature led to higher β-glucosides isoflavones content and antioxidant activity. ► Drying at 130 °C gave highest aglycones isoflavones content and α-glucosidase inhibitory activity.