Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Lactose Intolerance ?
    ### Response:
    A health care provider makes a diagnosis of lactose intolerance based on
                
- medical, family, and diet history, including a review of symptoms  - a physical exam  - medical tests
                
Medical, family, and diet history. A health care provider will take a medical, family, and diet history to help diagnose lactose intolerance.
    