Topics from A to Z: Letter L

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  • Lactose intolerance

    Lactose intolerance

    Stomach pain, bloating and "gas" are all typical digestion problems that some people have after eating or drinking dairy products. This may happen be...

  • Allergic contact dermatitis

    Allergic contact dermatitis

    In allergic contact dermatitis, the immune system overreacts to certain substances – sometimes to very small amounts – that normally wouldn’t cause a...