American Heart Association Nov 19 2025 Smoking even 2-5 cigarettes a day can more than double your risk of any type of heart disease and raise your risk of death from any cause by 60% compared to people who never smoked, according to new research supported by the American Heart Association's Tobacco Center for Regulatory Science and published in  PLOS Medicine.  The study found that even after you stop smoking, it could take up to 30 years or more to achieve the same level of health of someone