(EN) Provided is a food/beverage product that contains dietary fiber, vitamins, and a source of calcium but ameliorates the off flavors that arise from said nutritional components. Also provided are an off-flavor masking agent for the food/beverage product and an off-flavor masking method for the food/beverage product. A food/beverage product that contains stevia, dietary fiber, vitamins, and a source of calcium. An off-flavor masking agent for a food/beverage product that contains dietary fiber, vitamins, and a source of calcium, the off-flavor masking agent containing stevia as an active ingredient. An off-flavor masking method for a food/beverage product that contains dietary fiber, vitamins, and a source of calcium, the off-flavor masking method involving adding stevia to the food/beverage product. The food/beverage product is preferably an acidic milk beverage.