The invention relates to a method for inhibiting generation of nitrite ion or nitrite in health care products, food or medicinal material containing nitrate ion or nitrate and nitrate reductase. The method comprises inhibiting the activity of nitrate reductase in the health care products, food or medicinal material by using the health care food, food or medically accepted nitrate reductase. The invention particularly relates to a method for inhibiting generation of nitrite ion or nitrite in cubilose, comprising using cubilose-accepted nitrate reductase inhibitor to inhibit the activity of the nitrate reductase in cubilose. Particularly, the method comprises adding the cubilose-accepted nitrate reductase inhibitor with effective inhibiting amount in newly collected cubilose or adding cubilose-accepted nitrate reductase inhibitor with the effective inhibiting amount in the cubilose production process. The nitrate reductase inhibitor can be selected from tungstate. By adopting the method, generation of nitrite ion or nitrite in cubilose can be effectively inhibited, and the edible risk of the cubilose can be lowered.
