A new idea, an old therapy
Scientists have completed the first trial of a fecal transplant for food allergies in people. The results are promising. Researchers described them as exciting.
The treatment is known as a fecal microbiota transplant, or FMT. It moves gut bacteria from a healthy donor into a patient's digestive system. The idea is that changing the gut's microbial community can change how the immune system reacts to food. FMT is already used to treat serious gut infections, but this is the first time it has been tested against food allergies in a formal trial.
What the trial showed
The trial included a small group of patients with severe food allergies. Many had life-threatening reactions to common foods like peanuts, eggs, or milk. After treatment, some patients were able to tolerate small amounts of their trigger foods without an allergic response.
The researchers published their findings in Nature. They said the response varied from patient to patient. Some saw clear improvement, while others showed little change. Doctors measured allergic responses with blood tests and controlled food challenges. The team is now trying to understand which patients are most likely to benefit.
What comes next
The results are early, and the trial was small. Larger studies are needed to confirm the findings and to test safety over a longer period. Researchers also want to know how long the effects last and whether repeat treatments are required.
Food allergies affect millions of people worldwide. Current treatments focus on avoidance and emergency medicines. A therapy that changes the underlying immune response would be a step forward. For now, the researchers urge caution. They say patients should not try fecal transplants outside of clinical trials. But the door to a new class of allergy treatments is now open. If larger trials succeed, the therapy could one day be offered alongside standard allergy care.