YowUp! L. Casei is the first fermented dairy product in the world that does not need to be stored cold and contains millions of active probiotics that improve the immune system and digestive system of cats. The formula contains no added sugars, is lactose-free, and contains 0% fat. YowUp! L. Casei contains more than 1 million active L. Casei bacteria. These are encapsulated in a microcapsule, which keeps them inactive until they reach the cat's stomach. Due to the pH level of the stomach, the capsule dissolves and the L. Casei bacteria move to the intestines, maintaining their full effectiveness. Additionally, YowUp!