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Among the 250 known harmful chemicals in tobacco smoke, at least 69 can cause cancer." [7] [2] [8] [9] See: Health effects of tobacco smoking and List of cigarette smoke carcinogens. Although many of these additives are used in making cigarettes, each cigarette does not contain all of these additives.
Brazil's third batch of graphic images (since replaced), mandatory on all cigarette packs. Philippines. Graphic tobacco packaging warning messages from 2016 to 2018. Commercial tobacco smoke is a mixture of more than 5,000 chemicals. [1]
The harm from smoking comes from the many toxic chemicals in the natural tobacco leaf and those formed in smoke from burning tobacco. [89] People keep smoking because the nicotine, the primary psychoactive chemical in cigarettes, is highly addictive. [90]
Temperatures in burning cigarettes range from about 400 °C between puffs to about 900 °C during a puff. During the burning of the cigarette tobacco (itself a complex mixture), thousands of chemical substances are generated by combustion, distillation, pyrolysis and pyrosynthesis. [1] [2] Tobacco smoke is used as a fumigant and inhalant.
Second-hand smoking (SHS) is a combination of sidestream smoke (i.e., smoke emitted from the burning cigarette, pipe, or cigar) and the mainstream smoke exhaled from the lungs of smokers. It contains more than 4,000 chemicals, many of which are known to affect health.
Nicotine pouches are small pouches that contain a mix of nicotine, flavors, and other chemicals, but they don’t contain tobacco leaf, says Brittney Keller-Hamilton, PhD, a researcher with the ...
Many of the early brands of cigarettes were made mostly or entirely of Turkish tobacco. Its main use evolved to be included in blends of pipe and especially cigarette tobacco. (A typical American cigarette is a blend of bright Virginia, burley and Turkish.) White burley air-cured leaf was found to be milder than other types of tobacco.
The most important chemicals causing cancer are those that produce DNA damage since such damage appears to be the primary underlying cause of cancer. [105] The most carcinogenic compounds in cigarette smoke are acrolein, [106] formaldehyde, [107] acrylonitrile, [108] 1,3-butadiene, [109] acetaldehyde, [110] ethylene oxide, [111] and isoprene. [112]