why is cigarette smoking dangerous to your health effects of tobacco Smoking - Health Risks

Nitric oxide helps blood vessels relax and dilate

Nicotine products like cigarettes and chewing tobacco are scientifically proven to increase the chance of many different cancers

Harvard School of Public Health professor Gregory Connolly, however, says, "the use of smokeless tobacco by players has a powerful role-model effect on youth, particularly among young males in sport, some of whom remain addicted in future careers as professional athletes." [38] According to Connolly, one-quarter of Minor League players do not support allowing the use of chewing tobacco during games, and one-third of Major League players support abolishing it

However, both contain nicotine usually derived from tobacco plants