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They found that kids who used e-cigs were more likely than non-users to smoke cigarettes or other tobacco products over the next year. To study the short-term impacts of vaping, the researchers performed MRI exams on 31 healthy, non-smoking adults before and after vaping a nicotine-free e-cigarette. Comparing the pre- and post-MRI data, the single episode of vaping resulted in reduced blood flow and impaired endothelial function in the large (femoral) artery that supplies blood to the thigh and leg. The endothelium, which lines the inside surface of blood vessels, is essential to proper blood circulation. Once the endothelium is damaged, arteries thicken, and blood flow to the heart and the brain can be cut off, resulting in heart attack or stroke.

Youth ENDS use raises concerns about nicotine addiction, negative effects of nicotine on adolescent brain development, and other potential health harms, including increased risk of initiating cigarette smoking. Electronic nicotine delivery systems (ENDS), also called electronic cigarettes, e-cigarettes, vaping devices, or vape pens, are battery-powered devices used to smoke or "vape" a flavored or unflavored solution which usually contains nicotine. The American Academy of Family Physicians (AAFP) recognizes the increased use of ENDS, especially among youth and young adults, as well as its use by those attempting to quit smoking tobacco. Although e-cigarettes do not contain tobacco, for regulatory purposes, they are considered "tobacco products" by the US Food and Drug Administration (FDA) and the Centers for Disease Control and Prevention (CDC). E-cigarettes can go by different names, including vapes, vape pens or sticks, e-hookahs, hookah sticks, mods, and personal vaporizers.

Among girls, only a higher proportion of never-users in the school remained protective for S-SM and S-EC. Among boys, the same was observed for S-EC, whereas a higher proportion of students with positive attitudes towards snus use in one’s age group increased S-SN. Interestingly, a higher proportion of students planning for general upper secondary education had lowered S-EC and S-SN in the univariate analyses but increased S-SM and S-SN in the multivariate models. This may reflect, for instance, more complex interactions between individual- and school-level factors influencing susceptibility among boys. In general, students with positive attitude towards product use in one’s age group and current use of some other tobacco or nicotine product had consistently higher susceptibility regardless of product type.

Researchers noted that they were unable to assess any association between e-cigarette nicotine formulation and cigarette cessation outcomes. Another potential limitation was that the study only included adult participants who reported smoking within the previous 30 days, limiting information about younger smokers and former smokers. In that same vein, 5.9 million people began vaping, bringing the total use of tobacco products among those 12 and older to 64.4 million.

The FDA must act without further delay to remove all flavored e-cigarettes from the market. CDC recommends&nbsp