Overview: Lactase is used to help with symptoms of lactose intolerance. It is available over the counter as a dietary supplement in many forms, including as a liquid, tablet, chewable tablet, and ...

The ability of humans to digest the milk component lactose after weaning requires persistent production of the lactose-converting enzyme lactase. Genetic variation in the promoter of the lactase gene ...

Lactose intolerance happens when a person’s body cannot break down the sugar in milk — known as lactose — due to low levels of the enzyme lactase. Consuming milk and dairy products can lead to ...