Tobacco.org

Tobacco smoking, but not Swedish snuff use, increases the risk of multiple sclerosis  

Conclusions: Smokers of both sexes run an increased risk of developing multiple sclerosis (MS), and the risk increases with cumulative dose of smoking. However, the use of Swedish snuff is not associated with elevated risk for MS, which may indicate that nicotine is not the substance responsible for the increased risk of developing MS among smokers.

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