[EpicEng]

>harmful

Need a citation here. I've read the literature and the current consensus (as far as I'm aware) is "we don't know what the harms are". There is a study which suggest that nicotine may increase cancer risk in mice, though it is not a direct cause and even then the study was inconclusive.

Your link is a chart which shows relative lethal doses of substances. Nicotine requires a "very high" dose, not one you would ever get in practice. Not sure what point you were trying to make with that.