Category FAQs Search : Lactose Intolerance
Question: What are the four types of lactose intolerance?
Answer: The four types, and their causes, are:
1. Primary (caused by diminishing lactase production in your small intestine).
2. Secondary (caused by injury or disease that damages your small intestine).
3. Congenital (caused by lactase deficiency present at birth).
4. Developmental (caused by premature birth, when the small intestine is underdeveloped).
(Source: Cleveland Clinic, 31 Jan 2026)
Source Link: https://my.clevelandclinic.org/health/diseases/7317-lactose-intolerance