negative side effects of chewing tobacco The Health Smokeless Chewing tobacco - Wikipedia

Rio Bravo (1959) with Dean Martin

The study, published in Nicotine & Tobacco Research , suggests that recent claims by some scientists that e-cigarettes are likely to act as a gateway to the use of tobacco products are overstated, says the studys lead author, population scientist David Levy, PhD, a professor of oncology at Georgetown Lombardi Comprehensive Cancer Center

Imagine the faces of FDA executives while reading the Aubin 2008 study, when it hit them that in real-world use the nicotine patch, when used as a stand-alone quitting aid, unaccompanied by rich counseling and support, generated an extremely dismal six-month rate of just 7%, and vastly worse for second-time patch users

it can be hard to quit because nicotine, a chemical in tobacco and many e-cigarettes/vapes, is very addictive similar to cocaine and heroin