Although it seems like a fantastic idea, the idea of having caffeine in your E-Juice is most likely a gimmick. Considering caffeine naturally has a very bitter taste, dissipates at high heat, and only 60% potent when inhaled caffeine infused E-Juice doesn’t seem to be a viable option. Unless you’re okay with super concentrated caffeine that tastes very bitter, you’re better off getting your morning fix from coffee rather than looking at E-Juice as an alternative.

The truth is that there are major advantages and disadvantages of both surveys and clinical trials to examine the potential benefits of electronic cigarettes. Both types of study designs have inherent biases which can produce results that are more "favorable" or "unfavorable." This is why the methodology of published research needs to be examined so carefully. It is not so simple as to dismiss RCT evidence and accept survey evidence. One needs to consider the strengths and limitations inherent in both approaches. And at the end of the day, the only defensible approach, I believe, is that both types of studies are necessary, and we must carefully interpret and synthesize the findings from studies of multiple designs, using the totality of the evidence to make final judgments about the benefits of electronic cigarettes.

The Faculty of Public Health has been a strong opponent of e-cigarettes in the UK. In its , it recommends a complete ban on e-cigarette advertising. It also asserts that the tobacco industry is using e-cigarettes to promote cigarette smoking, that electronic cigarettes may be a gateway to smoking among youth, and that there is no solid evidence that e-cigarettes can help smokers quit. This despite its acknowledgment that there is no evidence for a gateway effect and that there is evidence that e-cigarettes are as effective as NRT for smoking cessation.

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