What are the causes of reactive hypoglycemia?

Updated: Sep 12, 2019
  • Author: Osama Hamdy, MD, PhD; Chief Editor: Romesh Khardori, MD, PhD, FACP  more...
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Answer

Reactive hypoglycemia can be idiopathic, due to alimentary problems, or a result of congenital enzyme deficiencies.

Alimentary hypoglycemia is another form of reactive hypoglycemia that occurs in patients who have had previous upper gastrointestinal (GI) surgical procedures (gastrectomy, gastrojejunostomy, vagotomy, pyloroplasty) and allows rapid glucose entry and absorption in the intestine, provoking excessive insulin response to a meal. This may occur within 1-3 hours after a meal. Very rare cases of idiopathic alimentary hypoglycemia occur in patients who have not had GI operations.


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