are prisoners allowed to smoke cigarettes Comment: Total smoking bans aren't the answer better prisoner health Smoking banned in Scottish prisons

Nicotine is of course in a cigarette, it's the main reason we smoke after all

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These include carbon monoxide, a gas present in cigarette smoke

Others point out that the study shows that smoking takes away a large chunk of your life, and that should be the main takeaway

Nicotine : A psychoactive compound that stimulates the central nervous system, leading to addiction and dependence