Why is tobacco harmful to health?

According to the analysis, tobacco contains about 1200 compounds, most of which are toxic to human body, especially nicotine, which is particularly harmful. Nicotine in one cigarette can poison a mouse, and nicotine in 20 cigarettes can poison a cow. If a person smokes 20 to 25 cigarettes a day, he will inhale 50 to 70 milligrams of nicotine, which can cause death. It is only because they are gradually inhaled that the human body has a certain detoxification ability and is spared.

Tobacco contains many carcinogens, in addition, there are many carcinogens and ciliated toxins that can reduce the body's ability to expel foreign bodies. These poisons attach to the tiny particles of cigarette smoke, reach the alveoli, and deposit there, strengthening each other. As a result, the carcinogenic effect is greatly enhanced. People who smoke more than 10 cigarettes a day have a lung cancer mortality rate 2.5 times that of non-smokers. In addition, smoking can also cause laryngeal cancer, oral cancer, nasopharyngeal cancer, esophageal cancer, pancreatic cancer, bladder cancer and so on.

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