Lactose Tolerance Test: Results and Values

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Lactose Tolerance Test

Lactose Tolerance Test | Preparation & Expectations | Results and Values

What do the test results mean?

Normally, individuals are able to convert the lactose that they have swallowed into glucose in the blood. Persons who have little or no lactase will be unable to convert the lactose normally into glucose. In people who are lactose intolerant, a rise in blood glucose of more than 2 milligrams per deciliter (mg/dl) will appear within 2 hours of lactose ingestion.

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Lactose Tolerance Test: Preparation & Expectations

Author: David T. Moran, MD
Reviewer: Sandy Keefe, RN, MSN
Date Reviewed: 08/07/01

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