Matcha calms allergy sneezes
- Research from Hiroshima University reported that matcha administration significantly suppressed sneezing linked to allergic rhinitis in tests. (es.wired.com) - The WIRED Spanish summary emphasized the result as a measurable suppression of sneezing after matcha intake. (es.wired.com) - The piece framed this as a specific lab finding suggesting matcha may have anti-allergy effects worth further study. (es.wired.com)
Allergic rhinitis is the immune overreaction behind hay fever: pollen or another trigger sets off histamine, and that can cause sneezing, itching, runny nose, and congestion. A new Hiroshima University study found matcha cut sneezing in mice with allergic rhinitis. (nature.com) The paper, published March 5, 2026 in *npj Science of Food*, tested matcha in an allergen-triggered mouse model of nasal inflammation. The authors reported that the sneeze response after allergen exposure fell to about half of the untreated allergic response. (nature.com) The mice were given matcha tea two to three times a week for more than five weeks, plus another dose 30 minutes before allergen exposure. Hiroshima University said the model was designed to mimic hay fever-like symptoms, including immediate sneezing and later nasal hypersensitivity. (hiroshima-u.ac.jp) The immune system usually gets most of the attention in allergy research, because Immunoglobulin E antibodies, mast cells, and T cells help drive the reaction. In this study, matcha did not meaningfully change those immune markers or the gut microbiome distribution the team measured. (nature.com) Instead, the researchers traced the effect to the nervous system — the body’s fast signaling network — and specifically to the sneeze reflex pathway in the brain. Histamine activated sneeze-related nerve activity, and matcha weakened that activation in the mice. (nature.com) That distinction matters for what the study is actually saying: the paper does not show that matcha prevented allergy itself. It suggests matcha may blunt one symptom, sneezing, by dialing down the reflex circuit that turns irritation into a sneeze. (nature.com) Allergic rhinitis is common and costly. A 2021 review in *Current Allergy and Asthma Reports* called it a growing public health, medical, and economic problem worldwide, with effects on sleep, concentration, and daily functioning. (pubmed.ncbi.nlm.nih.gov) The Hiroshima team said human studies with tea have previously suggested symptom relief, but the mechanism was unclear. Their new mouse data gives one possible explanation while stopping short of proving the same effect in people drinking ordinary amounts of matcha. (eurekalert.org) The authors said the next step is to test whether typical human intake is enough to reproduce the effect in patients. For now, the finding is a mouse result: matcha did not erase allergy, but it did appear to quiet the sneeze switch. (hiroshima-u.ac.jp)
