Lactose intolerance is a widespread metabolic disorder caused by the inability to digest lactose due to a shortage of the lactase enzyme. The typical symptoms of lactose intolerance (inactive lactase enzyme) include abdominal pain, bloating, flatus, diarrhea, and occasionally nausea and vomiting.
Indications for genetic testing:
1. Confirmation of clinical diagnosis
2. Differentiation between primary and secondary hypolactasia