Compare to Lactaid fast act (This product is not manufactured or distributed by McNeil Nutritionals, LLC. distributor of Lactaid). Helps prevent gas, bloating & diarrhea. Makes dairy products more digestable. Easy-to-swallow caplets. How it Works: This product helps to prevent the symptoms by breaking down the milk sugar (lactose) and making dairy foods easier to digest. This product is a dietary supplement, not a drug. This product works naturally and may be used by adults and children 4 years and over. May be used every time you eat food containing dairy-every meal, every snack, every day.