Lactaid Fast Act Chewables with natural lactase enzyme comes in a Vanilla Twist flavor and work quickly to make dairy foods easy to digest for those with lactose intolerance or dairy sensitivity. This digestive supplement helps symptoms that many people experience after eating foods containing dairy. The lactase enzymes in this dietary supplement contain 9000 FCC lactase units to help prevent symptoms associated with lactose intolerance by breaking down milk sugar (lactose).