Yes. Smoking decreases life expectancy by 8.8 years, on average, in heavy smokers. Users of smokeless tobacco have a higher life expectancy, since orally ingesting tobacco does not damage the respiratory system. Snus, a form of smokeless tobacco, statistically only decreases life expectancy by several weeks.
If you want to maximize your life expectancy, do not use tobacco. If you are unable to quit tobacco, switching to smokeless tobacco will increase your life expectancy significantly.
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