When our bodies have difficulty digesting dairy, the root cause may come from a lack of lactase enzymes, a lactose-digesting enzyme that works in our gut. Enzymes, such as lactase, are very specific to certain kinds of foods – lactose is predominantly found in dairy products and is broken down by lactate. When it comes to dairy digestion, the more lactase we have, the better our digestion can be. Lactose, which is a dairy sugar, isn't the only challenge. Many individuals who struggle with dairy actually have an intolerance to casein, a protein found in dairy. That's why Dairy Assist also contains protein digesting enzymes to address intolerance to not only lactose but also to help break down casein. If you haven't had success with other lactase-only formulas, casein may be your biggest challenge.