Category FAQs Search : Lactose Intolerance
Question: Is lactose intolerance genetic?
Answer: Genes determine how likely you are to continue to produce lactase, the enzyme that helps you digest lactose. Genes may also partly affect your gut sensitivity and the types of bacteria you have in your gut. Some bacteria convert lactose into gas, but others convert it into lactic acid, which may not cause symptoms.
You’re more likely to have lactose malabsorption and lactose intolerance if your genetic profile is:
1. Asian.
2. Native American.
3. Hispanic.
You may be more likely to have lactase persistence and lactose tolerance if your genetic profile is:
1. Northern European.
2. African.
3. Middle Eastern.
Rarely, some people are born with congenital lactase deficiency. This is a genetic disorder that causes lactose intolerance from birth.
(Source: Cleveland Clinic, 31 Jan 2026)
Source Link: https://my.clevelandclinic.org/health/diseases/7317-lactose-intolerance