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how bad is chewing tobacco DVIDS - News Is Chewing Tobacco Safer than
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Jonathan Winickoff M.D

Kenny D (1979) Correlation and causation

West, R., & Shiffman, S

One of the alkaloids in tobacco is nicotine, which is easily absorbed into the respiratory tract, skin and intestinal mucosa

Smoking and other unhealthy habits can significantly reduce blood flow, which can make getting an erection much more challenging
