Lactose free
Not everyone produces enough lactase. When the small intestine produces too little or no lactase, lactose cannot be digested properly. This is called lactose intolerance. Undigested lactose then ends up in the large intestine, where intestinal bacteria ferment it.
Lactose intolerance is different from a milk allergy. With a milk allergy, the immune system reacts to the proteins in milk, while with lactose intolerance, the concerns the inability to digest lactose.
