Bacteria, fungi, and viruses probe your skin, gut lining, and airways for any weakness, and your immune system fights back with an arsenal most people are not familiar with
10.3390/ph18050668 [DOI] [PMC free article] [PubMed] [Google Scholar] Liutkus J., Rosas Guzman J., Norwood P., Pop L., Northrup J., Cao D., et al
Since we assigned the same PM 2.5 exposure value to all children residing within a given PSU, there is potential for exposure misclassification due to within-PSU variability in actual exposure that could not be accounted for
Weight of evidence: Overall evidence is Low-Moderate: multiple animal studies and a growing number of small clinical trials suggest benefits across gutbrain signaling, social and behavioral domains, gastrointestinal symptoms, and neurophysiological patterns, yet most human studies rely on caregiver-reported outcomes, lack biomarker integration, and seldom control for diet, comorbidities, or baseline microbiome composition
