There is no claim of 100% safe e-cig, but the harmful effects of smoking is well documented. I am not a doctor and I am not qualified to give medical advice. I only share my own opinion and experiences within this site.I do not condone electronic cigarettes for non-smokers, underage people, or pregnant women.

Misleading use of survey data has no place in professional public health practice

E-Cig Regulations

In fact, one of the complaints in the comment is that "E-cigarette companies are marketing e-cigarettes as healthier alternatives to cigarette smoking."

Luchtenborg et al. that while non-filtered cigarettes increased the risk for colon cancer (OR 1.59; 95% CI, 1.15-2.21; P(trend) = 0.001), filtered cigarettes did not increase colon cancer risk (OR 1.05; 95% CI, 0.79-1.39; P(trend) = 0.98).

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