I purchased this from a bookstore about two years ago and have kept it at home. 【The Amazing Benefits of Fermented Napa Cabbage】 Good for the gut and improves health Makes food more delicious Can be stored for a long time & used in large quantities "Fermented napa cabbage" is easily made by salting chopped napa cabbage and leaving it at room temperature for a few days. It's packed with lactic acid bacteria that improve the gut environment, so eating it regularly will energize your body. It also offers benefits such as boosting immunity, improving skin, and lowering blood sugar. It can be stored in the refrigerator for a long time and can be used in salads, hot pots, main dishes, and more. The fermentation process enhances the umami flavor, making any dish delicious.