how old.do you have to be to buy cigarettes Tobacco 21: Raising awareness about the federal law US raises legal age to

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Military personnel who smoke are less productive and do not perform as well on physical fitness tests relative to nonsmoking personnel

PMID: 16614115

Cardiovascular effects Studies are inconclusive as to how significantly smokeless tobacco affects users' cardiovascular systems, but it has been studied that it may have more nicotine than cigarettes