Intestinal gas can be a big problem for people who lack the enzymes to digest certain foods like milk and dairy products. With the Lactose Intolerance: Enzyme Digestion Demonstration—ChemTopic™ Lab Activity, illustrates the use of a commercial enzyme product called Lactaid™ as an aid in milk digestion for those who lack the enzyme required to digest lactose. Available as part of the Biochemistry: The Molecules of Life—ChemTopic™ Labs digital collection. Click the Price link for digital collection pricing.