Nicotine has its own risks as a stimulant, for sure, no different than caffeine in a lot of ways. The biggest issue with smoking is particulate getting into th

Nicotine has its own risks as a stimulant, for sure, no different than caffeine in a lot of ways. The biggest issue with smoking is particulate getting into the lungs. Firemen who spend their whole careers breathing non-tobacco smoke have rates of heart disease and cancer similar to regular cigarette smokers. https://www.cdc.gov/niosh/firefighters/health.html https://www.cdc.gov/niosh/firefighters/health.html