Lactase Supplement helps prevent symptoms associated with Lactose Intolerance (including gas, bloating and dirrhea) that many people experience after eating dairy products. How does Fast Acting Lactase Supplement work? By breaking down lactose (milk sugar) it helps make dairy foods easier to digest and helps to prevent uncomfortable symptoms.This product is a dietary supplement which contains natural lactase enzyme. It is not a drug.May be used by everyone ages 4 years and up.