Scientists and the general public have been aware of the harmful effects of tobacco for years now, recognizing its links to cardiovascular problems, cancer, and an array of other serious health problems. The Centers for Disease Control states that cigarette smoking accounts for over 480,000 deaths every year in the United States, and seven million deaths worldwide annually, which makes smoking the leading cause of preventable death in the world.1 Of those 480,000 deaths per year in the United States, the CDC includes more than 41,000 deaths resulting from secondhand smoke exposure. Secondhand smoke can cause or worsen a wide range of damaging health effects in children and adults, including lung cancer, respiratory infections and asthma. Scientists have concluded that the only real difference between first and secondhand smoke is consent. Children and others exposed to secondhand smoke suffer the same consequences but did not intend to smoke at all.2 In toto, cigarette smoking results in one in five deaths annually, or 1,300 deaths every day. On average, smokers die 10 years earlier than nonsmokers.
Unfortunately for individuals who are smoking or exposed to cigarettes, new research indicates that tobacco use contributes to yet another health problem: biological aging. Previously, studies on the effects of tobacco use on aging have been fairly limited in their conclusions, but in recent years researchers have focused more on the question, applying new scientific tools in their work. One recent study, by Mamoshina et. al., used artificial intelligence to analyze blood and cell counts of smokers and non-smokers and to measure how much tobacco use aged smokers.