So I took a chance and used it on my personal vaporizer. I checked my resting heartbeat at the beginning of the hour and checked it again after an hour of vaping the caffeine infused E-Juice. No difference. So great I’m not going need hospitalization which, of course, is fantastic news. As far as how I felt, I really felt no difference at all. I didn’t get the sudden jolt of energy when I normally have an energy drink or a cup of coffee. So I decided to continue using it for the rest of the day just to see if it took longer for the caffeine to kick in for some reason.

They conclude that "our data add to the current evidence that e-cigarettes may not increase rates of smoking cessation."

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