Juul Pods Contain Hazardous br Toxins, Says Harvard Study.br The study was published br in the 'American Journal of Respiratory br and Critical Care Medicine' last week.br Of the 54 Juul pods br analyzed for the study, br 46 tested positive for br glucan, a microbial toxin.br Studies have shown that br inhaling airborne glucan could br lead to severe inflammation of human airways.br Lung inflammation br can lead to a host of health issues, br including asthma, emphysema and br Chronic Obstructive Pulmonary Disease.br The highest levels of glucan br were found in the tobacco br and menthol flavor Juul pods.br A study in April found that br glucan was present in more br than 80 of e-cigarette products.br The president of the br American Vaping Association (AVA) br criticized the Harvard study.br These authors have identified no actual risk ...