PROBLEM TO BE SOLVED: To provide a lactic acid bacterium fermentation product using a polyphenol component, such as a water extract of pine bark, astringent skin of peanuts, grape seeds or azuki beans, and a method for producing the same.SOLUTION: The lactic acid bacterium fermentation product is obtained by lactic acid-fermenting, for example, a water extract of azuki beans with Lactobacillus piantarum. As the water extract of azuki beans, use can be made of, for example, a broth that is obtained by cooking azuki beans in water in the course of producing a sweat azuki bean paste. The lactic acid bacterium fermentation product has an anti-SARS (Sub-Acute Respiratory Syndrome) corona virus activity thrice or more as high as the activity of the unfermented material. This lactic acid bacterium fermentation product is widely usable as a starting material to be added to drinks, foods such as ice creams, baked products, candies, chewing gums and desserts, tablets, injections, nasal drop compositions for preventive and therapeutic uses, drops, gargle solutions and mouth washers.【課題】ポリフェノール成分、例えば、松樹皮、ピーナッツ渋皮、ブドウ種子、小豆等の水抽出物を利用した乳酸菌発酵物及びその製造方法を提供すること。【解決手段】乳酸菌発酵物は、例えば、小豆の水抽出物をラクトバチルス・プランタラム（Lactobacillus plantarum）により乳酸発酵させて得られる。小豆の水抽出物としては、例えば製餡過程において小豆を水で煮る時に得られる煮汁が用いられる。本発明に係る乳酸菌発酵物は未発酵物に比べて抗ＳＡＲＳ（Sub-Acute Respiratory Syndrome）コロナウイルス活性が３倍以上向上する。上記乳酸菌発酵物は、例えば、飲料、アイス、焼き菓子、アメ、ガム、デザート等の食品の添加原料、錠剤、注射剤、予防・治療用鼻溶液組成物、ドロップス、うがい液、洗口液等の添加原料として広く利用することができる。【選択図】図１
