The mushroom beta glucans and polysaccharides in our High Potency 7 Mushroom Complex are extracted using a dual method of both hot water and alcohol, ensuring the optimal mix of biologically active ingredients. While some mushrooms such as cordyceps do not require the dual extraction, the triterpenes of chaga and reishi mushrooms are not water soluble and so require the extra work.   The end result is a highly concentrated mixture of the bioactive mushroom components that will provide maximal benefit to your pet’s immune system.