PRODUCT DESCRIPTION - Fermented Superfood, 100+ Vegetables, Fruits, Probiotics, Prebiotics ＆ Postbiotics Cleanse - “Koso” means enzyme or ferment in Japanese. Koso drink is a century-old traditional fermented drink made from vegetables, fruits, and plants. It's an essential part of the Japanese style of juice cleanses or intermittent fasting. Koso Cleanse is a century-old traditional Japanese juice cleansing method that has proven to keep your gut healthy. R’s KOSO is the only superfood supplement on the market that provides balanced nutrition, combining probiotics, prebiotics and, postbiotics, which have proven to improve gut health and boost immunity.