The FDA is allowing vaping brand Juul to keep its e cigarettes on the market. Studies from Juul show its e cigarettes are less harmful for adult smokers, who can benefit from switching completely Juul's Harmful Side Effects Office for Science and Society McGill University What is a JUUL? Did you know one Juul pod is nearly equal to one pack of cigarettes? According to a study published in the National Library of Medicine, one JUUL pod appears capable of delivering