How is a dietary history used for diagnosing lactose intolerance?

    Researchedby:
    Kamal Patel
    Last Updated: October 13, 2024

    Lactose intolerance in adults can be diagnosed by a careful dietary history. Keeping a written record of both food and digestive symptoms can reveal a relationship between lactose-containing foods and symptoms. The digestive symptoms of lactose intolerance usually develop 20 minutes to two hours after consuming lactose.[1]