It's not easy to quit smoking.
Tobacco use is the leading cause of preventable death. But by some estimates, it could take as many as 30 tries to quit.
In July, the FDA came out with plans to limit the amount of nicotine in cigarettes, with the aim of not making them addictive. The news sent tobacco stocks falling. Researchers have speculated that cutting nicotine levels could make it easier for smokers to quit, and keep new smokers from getting addicted.
"Rendering cigarettes minimally...