Lactose intolerance

Causes

Appropriate Tests

 

A trial lactose-free diet may provide a useful initial assessment.

Small bowel biopsy with assay of disaccharidases.

Lactose tolerance test (with assay of breath hydrogen or plasma glucose) may cause diarrhoea and abdominal pain and is rarely performed.

Racial

 

Genetic

 

Post-gastroenteritis

 

Malabsorption