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This is an accepted version of this page This is the latest accepted revision, reviewed on 7 January 2025. Circumstances, mechanisms, and factors of tobacco consumption on human health "Health effects of smoking" and "Dangers of smoking" redirect here. For cannabis, see Effects of cannabis. For smoking crack cocaine, see Crack cocaine § Health issues. "Smoking and health" redirects here. For ...
Third-hand smoke is residual nicotine and other chemicals left on a variety of indoor surfaces by tobacco smoke. This residue reacts with indoor pollutants to create a toxic mix. Containing cancer-causing substances, this third-hand smoke poses a potential health hazard to nonsmokers who are exposed to it, especially children.
Smoking tobacco causes various types and subtypes of cancers [94] (particularly lung cancer, cancers of the oropharynx, [95] larynx, [95] and mouth, [95] esophageal and pancreatic cancer). [18] Using tobacco, especially together with alcohol , is a major risk factor for head and neck cancer . 72% of head and neck cancer cases are caused by ...
A 2014 Surgeon General of the United States report stated that the single relevant randomized trial "does not indicate a strong role for nicotine in promoting carcinogenesis in humans".: 116 They concluded that "There is insufficient data to conclude that nicotine causes or contributes to cancer in humans, but there is evidence showing possible ...
Nicotine does not cause cancer or lung disease, according to the FDA. Addiction to nicotine can be particularly tough to break when the usage is associated with coping methods for stress, anxiety ...
Tobacco smoke, besides being an irritant and significant indoor air pollutant, is known to cause lung cancer, heart disease, chronic obstructive pulmonary disease (COPD), emphysema, and other serious diseases in smokers (and in non-smokers as well). The actual mechanisms by which smoking can cause so many diseases remain largely unknown.
Polonium-210 is a radioactive trace contaminant of tobacco, providing additional explanation for the link between smoking and bronchial cancer. [121] The radioactive particles build up over time in the lungs and a UCLA study has estimated that the radiation from 25 years of smoking would cause over 120 deaths per thousand smokers. [122]
Nicotine is an agonist at nicotinic acetylcholine receptor which are present in the central and autonomic nervous systems, and the neuromuscular junction. At low doses nicotine causes stimulatory effects on these receptors, however, higher doses or more sustained exposures can cause inhibitory effects leading to neuromuscular blockade. [4] [30]