Immune Boost is one of our favorite herbal powders for supporting cats that are toxic, malnourished or struggling with chronic allergies and infections. This blend is not only full of nutrients including b-vitamins, magnesium, potassium and vitamin C but it will also detoxify the liver and kick-start the immune system. This formula has been seen to be particularly beneficial for cats that have trouble gaining weight. Beneficial for: Nutrients, Detoxification, Immunity.