This invention relates to a food supplement for reducing body odor; it is a mixture of edible carriers with chitin aqueous solution lyophilized powder, chitosan aqueous solution lyophilized powder, chitin powder, chitosan powder, or the composition of these ingredients, and it comes in the form of tablets or pills. The invention has an outstanding effect in reducing various types of body odors, including Koreans' unique body odor, such as Kimchi smell or garlic smell, westerners' unique body odor, such as cheese smell or butter smell, Arabs' unique body odor, such as mutton smell, armpit odor and body odor that is unique in the aged.