Medical Subject Headings

Last uploaded: March 22, 2026
Id http://purl.bioontology.org/ontology/MESH/D007787
http://purl.bioontology.org/ontology/MESH/D007787
Preferred Name

Lactose Intolerance

Definitions
The condition resulting from the absence or deficiency of LACTASE in the MUCOSA cells of the GASTROINTESTINAL TRACT, and the inability to break down LACTOSE in milk for ABSORPTION. Bacterial fermentation of the unabsorbed lactose leads to symptoms that range from a mild indigestion (DYSPEPSIA) to severe DIARRHEA. Lactose intolerance may be an inborn error or acquired.
Synonyms
Alactasia
Dairy Product Intolerance
Malabsorption, Lactose
Hypolactasia
Lactose Malabsorption
Milk Sugar Intolerance
Intolerance, Lactose
Type http://www.w3.org/2002/07/owl#Class
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