34The Ultimate Guide to Red Light TherapyAnother study used a combination of visible and infrared light, applied directly inside the nose, to treat 22patients with confirmed allergic rhinitis over a four-week period.27To track the effectiveness of the treatment,patients filled out weekly questionnaires about their symptoms.The researchers also collected samples of nasal fluid before and after the treatment course.27These sampleswere analyzed using a sophisticated technique called fluorescence-activated cell sorting, which allowedthem to count specific types of immune cells involved in allergic reactions.After four weeks of treatment, patients reported significant improvements in various symptoms, includingitching in the nose, eyes, throat, and ears, as well as reduced nasal discharge, congestion, and sneezing.Whenscientistslookedcloserat27themucus samples from people‘s noses,theyafoundshiftcellsinsomethingthepresent.neutrophils,typesThere27whichareunexpected:ofimmunewerefewerwhitebloodcells that jump into action fast to fightinfections.Ontheotherhand,thenumber of eosinophils went up. Thesewhite blood cells are usually linked toallergies.Interestingly, the total number of thesetwocelltypes(calledstayed the same.bodyswapped27granulocytes)It seems like theoutsomeinfectionfighters (neutrophils) for allergy fighters(eosinophils) in the nose.While these findings suggest that intranasal light therapy could be an effective treatment for allergic rhinitis,leading to noticeable symptom improvements, the changes in immune cell populations warrant furtherinvestigation to fully understand the mechanism behind these effects.27
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