Nicotine, the main chemical in tobacco, is not good for the body, and prolonged smoking makes smokers dependent and complicates other diseases.
Nicotine is absorbed by the lungs, spreads through the lungs into the circulation, and eventually enters the brain where it stimulates the release of dopamine, which gives smokers a sense of pleasure and creates important dependence and addiction.
Nicotine has no beneficial effects on the human body and causes irritation of the respiratory mucosa of the respiratory system, resulting in an inflammatory response, which in severe cases can induce lung cancer and promote the proliferation, invasion and angiogenesis of cancer cells. Nicotine will have an effect on the cardiovascular system, increasing arterial blood pressure in the body circulation, damaging the lining of blood vessels, causing thrombosis to produce harm.
Nicotine can also induce other cancers, such as pancreatic cancer, bladder cancer, liver cancer and so on. So smokers are advised to quit smoking.