Smoking will make you thinner, but it is very harmful. Because nicotine in cigarettes can stimulate brain excitement, resulting in excessive secretion of thyroxine and catecholamine hormones. Thyroxine can promote decomposition, and at the same time, it will cause hyperthermia and hunger. Catecholamine hormone regulates the content of calcium and phosphorus in the body, promotes the decomposition of substances, and can also make people feel excited; Its function is just the opposite of insulin, so it is easy to cause diabetes and lose weight.

Smoking is harmful, not only to human health but also to society. As long as there are signs of life, any organized organism must breathe, exhale carbon dioxide in the body, inhale oxygen in the air, and carry out metabolism to maintain normal life activities. Non-smokers can breathe a lot of fresh air every day; However, people who smoke regularly do not enjoy the benefits of nature. What they breathe in is not fresh air, but toxic gas polluted by smoke.

2. Tobacco leaves contain toxic nicotine, also called nicotine. 1 g nicotine can poison 300 rabbits or 500 mice. If people are injected with 50 milligrams of nicotine, they will die. Smoking is the most harmful to the respiratory tract, and it is easy to cause cough diseases such as laryngitis, tracheitis and emphysema. When smoking, smoke enters from the mouth, passes through the throat, trachea and bronchus, and enters the blood.

3. Smoking will make men lose Y chromosome and increase the risk of cancer. 2065438+0710127 October, the list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization was preliminarily sorted out for reference. Smoking is in the list of carcinogens. /zhidao.baidu.com/question/242732580194105964.html "target =" _ blank "title =" webpage link "> webpage link.