soymilk is popular food commodities consumed in Asian countries and are being introduced in North America. During processing of soymilk, soybeans have to be soaked and then heated at 100 ๐C for a certain period of time. Since the conversion of malonyl or acetyl glucosides to glucosides or aglycones of isoflavones in soymilk is affected by various soaking and heating treatments. The objective of this study was to determine the stability of isoflavone during processing of soymilk.