The antioxidation food product of the present invention is produced by fermenting
a food product containing bacteria having catalase activity, such as Lactobacillus
plantarum, in the presence of a manganese-containing natural material. The
antioxidation food product has antioxidation activity in viva, including the digestive
tract, by simultaneously expressing a superoxide dismutase-like activity and a
catalase activity, and is effective for preventing disease caused by active oxygen.
