Allergic to Milk Underlying Cause
Lactose is a sugar found in dairy products. Lactase is an enzyme in the intestine that breaks down lactose into glucose and galactose, which can be absorbed into the bloodstream. Lactose intolerance is caused by the absence of lactase in the intestine. Lactose collects in the intestine, absorbs water, and causes diarrhea.
Lactose intolerance may be caused by:
- An inherited condition
- An underlying illness
Illnesses that may cause lactose intolerance include:
Continue to Allergic to Milk Anatomy
- Lovelace HY, Barr SI. Diagnosis, symptoms, and calcium intakes of individuals with self-reported lactose intolerance. J Am Coll Nutr. 2005 Feb;24(1):51-7. 
- Suarez FL, Savaiano DA, Levitt MD. Review article: the treatment of lactose intolerance. Aliment Pharmacol Ther. 1995 Dec;9(6):589-97. 
- Swagerty DL Jr, Walling AD, Klein RM. Lactose intolerance. Am Fam Physician. 2002 May 1;65(9):1845-50.