<P> Lactase is an enzyme produced by many organisms . It is located in the brush border of the small intestine of humans and other mammals . Lactase is essential to the complete digestion of whole milk ; it breaks down lactose , a sugar which gives milk its sweetness . Lacking lactase , a person consuming dairy products may experience the symptoms of lactose intolerance . Lactase can be purchased as a food supplement , and is added to milk to produce `` lactose - free '' milk products . </P>
<P> Lactase is an enzyme produced by many organisms . It is located in the brush border of the small intestine of humans and other mammals . Lactase is essential to the complete digestion of whole milk ; it breaks down lactose , a sugar which gives milk its sweetness . Lacking lactase , a person consuming dairy products may experience the symptoms of lactose intolerance . Lactase can be purchased as a food supplement , and is added to milk to produce `` lactose - free '' milk products . </P>
where is lactase produced in the digestive system
where is lactase produced in the digestive system
brush border of the small intestine
brush border of the small intestine