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It’s absolutely addictive, anyone who says otherwise is suspect

What I take issue with is the original sentence saying it’s “bad for you”, I was expecting new science showing that it’s, well, bad for you rather than “just” addictive

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Well, it becomes bad for you if you start needing to take so much of it that the other stimulant effects start causing problems, like poor sleep. Most addictive substances have this potential, since "the dose makes the poison". But the same dose forever rarely satisfies cravings forever.

“Just nicotine”/nicotine salts can elevate blood pressure and heart rate which can be very dangerous for some people and long-term bad if not resolved. But by far tobacco smoking is the most physically dangerous which is obviously not the same as “just nicotine”.

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