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The antioxidant activities of Epimedium koreanum N. methanol extract on the oxidation of fats and oils were studied by measuring peroxide values during storage at 75℃ . The methanol extract showed high antioxidant activity on the oxidation of lard and corn oil, and the antioxidant effectiveness increased as the concentrations of the extract in lard increased. After heating the extract at 1800 for 120 min, the heat-treated extract exhibited above 66% of the original antioxidant effectiveness on the oxidation of lard during storage at 75℃ . Epimedium koreanum N. extract, however, accelerated the oxidation of soybean oil during storage under irradiation of ultraviolet light. The main antioxidant components in Epimedium koreanum N. extract seemed to be tocopherols and flavonoids. The contents of α, α, γ and b-tocopherol in the extract were 21.61, 1.48, 5.50 and 3.75 mg%, respectively.
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