Supports to reduce gas, diarrhea, bloating, by making dairy foods easier to digest.Enjoy dairy again! Approximately 40 uses: 3 caplets per serving. Helps prevent: gas; diarrhea; bloating by making dairy foods easier to digest. Take with your first bite. If you experience gas, bloating or diarrhea after eating dairy foods due to difficulty in digesting lactose, Lactaid is right for you. How does Lactaid Supplement work? Lactaid is a dairy digestive supplement that contains a natural enzyme. Lactaid breaks down lactose, a milk sugar, making dairy foods easier to digest.