Main product description People in whom this enzyme is not produced in the body cannot fully use lactose, which can have unpleasant symptoms. Lactase enzyme corrects lactose digestion in people who have difficulty digesting lactose.* LACTASE ENZYME is an ideal supplement for those who would like to use the positive effects of whey protein, casein, caseinate or other proteins, but are sensitive to lactose. On average, 2500 FCC units are required to digest 10-13 grams of lactose. For people with a very high sensitivity to lactose, with a need for 100% digestive support, it is recommended to take 10,000 FCC units with each meal. Just 2 LACTASE NZYME capsules provide this amount of enzyme!