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We demonstrate that, similar to acrolein or combustible cigarette smoke, aerosols from e-cigarette solvents (vegetable glycerin and propylene glycol) induce bradycardia, bradyarrhythmias, and elevations in heart rate variability during inhalation exposure, with inverse post-exposure effects

And by that I mean more than once a week, never mind at least once a day (which would be a true measure of a formed habit, rather than just toying with it) the any use in the past 30 days measurement used in the US is quite patently a deliberately poor measure chosen for political purposes

Pharmacodynamic dose effects of oral cannabis ingestion in healthy adults who infrequently use cannabis

Usually, Theyll check your luggage not your person