he 2016 Royal College of Physicians (RCP) report “Nicotine Without Smoke” says that “robust evidence on the safety of long-term nicotine use in humans from the 5-year Lung Health Study, in which participants were actively encouraged to use NRT for several months and many continued to consume NRT for a much longer period, demonstrates no association between sustained NRT use and the occurrence of cancer (lung, gastrointestinal or any cancer) or cardiovascular disease.”
Cancers from smoking are caused by the combustion of tobacco. The smoke forms a sticky chemical slurry called tar, and the tar coats delicate parts of the lungs. Over the course of years, the damage created by tar in the lungs can lead to tumor growth. According to the National Cancer Institute (NCI), most of the cancer-causing substances in cigarette smoke is in the tar. Tar also causes damage that can lead to lung diseases like emphysema and bronchitis.
