What is the best way to diagnose lactose intolerance?

Cassandra McMillan, David V Power, James Beattie

Research output: Contribution to journalArticlepeer-review


For most patients, a careful history and a 2-week lactose-free diet that results in resolution of symptoms-which then recur when lactose is reintroduced-is sufficient to make the diagnosis. Other tests may be used for atypical or complicated cases or when the diagnosis of lactase deficiency needs to be confirmed; of these, the hydrogen breath test is the most widely applicable. (SOR C, based on expert opinion.).

Original languageEnglish (US)
Pages (from-to)9-10
Number of pages2
JournalEvidence-Based Practice
Issue number6
StatePublished - Jun 1 2008


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