Does food intolerance testing treat lactose intolerance?

Lactose is the natural sugar in milk and some dairy products. When the small intestine does not break down enough lactose, it can pass into the bowel and draw in fluid while bacteria ferment it. This may lead to bloating, wind, cramps, nausea, or diarrhoea after dairy. Symptoms can depend on the amount eaten and the product. Testing may support an assessment, but symptoms can have other causes and a result does not remove the underlying digestive difficulty.

Note which dairy foods cause symptoms, the portion, and how soon symptoms start. A clinician may suggest a suitable test or a carefully planned dietary trial. Many people can tolerate some lactose, so removing all dairy may be unnecessary. If dairy is reduced, discuss calcium and vitamin needs and suitable alternatives. Lactase products or lactose-reduced foods may be options for some people, but choose them with advice if symptoms are persistent or the diagnosis is uncertain.

Arrange an assessment if symptoms are frequent, new, worsening, or happening without dairy. Seek urgent help for facial or throat swelling, breathing difficulty, collapse, severe dehydration, blood in stool, or intense abdominal pain. These signs may indicate a different or urgent problem; lactose intolerance does not explain every reaction to food.

Ask which test, if any, fits your symptoms, whether a supervised lactose reduction is reasonable, and how to protect nutrition while changing dairy intake. Ask how lactose intolerance differs from a milk allergy.