Dietary Supplement For Lactose Intolerance Lactose intolerance occurs in more than 50% of the world's population. Source Naturals Lactase Digest assists in the digestion of dairy products for people with lactose intolerance. Lactase Digest provides the lactase enzyme that breaks down lactose and supports the relief of discomforts associated with dairy intolerance. It is available in vegetarian capsules and is suitable for vegetarians.