The study found that among people 40 and older, smokers were two-and-a-half times as likely as nonsmokers to develop COPD, while smoking cigarettes and marijuana together boosted the odds of developing COPD to three-and-a-half times the risk of someone who did not smoke either cigarettes or marijuanain other words, adding marijuana smoking to cigarette smoking increased the risk by one-third, says Wan Tan, M.D., of St
Tobacco is unique because it is a legal substance that contains nicotine which is highly addictive and highly carcinogenic (cancer causing)
When nicotine is no longer present, the brain struggles to regain balance, leading to heightened emotional distress and mental fog, which make the quitting process psychologically demanding
Danielsen B, Manji F, Nagelkerke N, Fejerskov G, Baelum V