Lactase is an enzyme that is responsible for breaking down lactose, a type of sugar found in milk and dairy products. Synonyms for lactase include beta-galactosidase, lactase-phlorizin hydrolase, beta-D-galactoside galactohydrolase, and lactose hydrolase. These enzymes are essential for people who are lactose intolerant, as they cannot properly digest lactose without them. Lactase supplements are available for people who suffer from lactose intolerance, and they can help to reduce symptoms such as bloating, gas, and diarrhea. Knowing the synonyms for lactase can be helpful when researching or discussing lactose intolerance with others.