A BMJ report on the review led by Allan Hackshaw, a professor at University College London in the United Kingdom He and his colleagues calculated that the risk from smoking about one cigarette per day is around half that for people who smoke 20 per day. The findings challenge a widely held view that smoking just a few cigarettes per day is relatively safe. Instead, the report concludes that: No safe level of smoking exists for cardiovascular disease. Tobacco is the only legal drug that kills many of its users when used exactly as intended by manufacturers, The latest WHO estimates In the United States, smoking is the most preventable cause of premature death, according to the American Heart Association, Smoking raises the risk of developing many persistent health problems, including atherosclerosis, a condition in which fatty deposits build up inside arteries, thereby raising the risk of stroke and coronary heart disease

The following are other health effects of smoking: Lung disease Smoking tobacco products, including cigars, increases your risk for lung diseases, including chronic obstructive pulmonary disease (COPD)
[206] In 1981, Stephen Holden wrote in The New York Times that "neither age (he's now 40) nor his much-publicized conversion to born-again Christianity has altered his essentially iconoclastic temperament"
The amount of life expectancy that can be recovered by quitting smoking can depend on several factors, according to the new research
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