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We have isolated functional metabolites from Cheongkukjang and Kochujang,which are Korean traditional fermented foods,and their functional propeties in terms of antiobesity effects were investigated.Two saponin groups (soyasapogenol A and B) were isolated by a HPLC/ELSD system from Cheongkukjang,and it was elucidated that soyasapogenol B various having health benefits was four times higher than that of soyasapogenol A.Also four capsaicinoids (Nordihydrocapsaicin,capsaicin,dihydrocapsaicin and homodihydrocapsaicin) have been identified from Kochujang by HPLC with a Fluorescence detector and ESI-MS/MS