Celiac + Lactose Intolerance

​I had the incredible opportunity to intern with Katarina Mollo this summer at the Massachusetts Hospital for Children, where she serves as a dietitian in the celiac clinic. Working closely with a dedicated team of nurses and doctors, I gained invaluable insights into the complexities of managing celiac disease. I am truly grateful for this enriching experience, which deepened my understanding of the condition.

One of the most fascinating topics I explored with Katarina was the connection between celiac disease and lactose intolerance, a subject that significantly impacts many patients. Research indicates that lactose intolerance is particularly prevalent among individuals with celiac disease during the first year following their diagnosis. This correlation arises because both conditions affect the same area of the small intestine, leading to similar digestive challenges.

The small intestine is responsible for producing lactase, an enzyme critical for breaking down lactose—the sugar commonly found in dairy products. When someone with celiac disease consumes gluten, it damages the intestinal lining, impairing its ability to produce lactase. Consequently, this damage results in the body’s inability to digest dairy effectively, leading to discomfort and gastrointestinal issues.

Moreover, it is important to understand that this dairy sensitivity is not solely an immediate response to gluten consumption; rather, it can recur each time gluten is ingested. Many patients report experiencing symptoms of lactose intolerance after eating gluten, highlighting the ongoing impact of intestinal damage.

To support recovery and minimize symptoms, it is generally advised that individuals with celiac disease eliminate dairy products from their diet for at least one week (or more, depending on symptoms). This period allows the small intestine a chance to heal from gluten exposure, ultimately aiding in the restoration of normal digestive function and reducing the risk of further illness. Understanding this relationship between celiac disease and lactose intolerance is vital for effective dietary management and improving the quality of life for affected individuals.

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