Normal people smoke a few cigarettes a day.

Normal people smoke 0-5 cigarettes a day has little effect on the body.

Tobacco contains a lot of harmful substances such as nicotine, coal tar, benzopyrene, etc., which are easy to damage human health. After smoking, the harmful substances in tobacco will accumulate in the body. The number of cigarettes smoked per day is no more than 5, which is less harmful to the body. However, if the human body smokes excessively for a long time, nicotine, benzopyrene and other substances will cause long-term damage to its brain tissue, brain nerve and lung tissue.

Nicotine in tobacco promotes vasoconstriction of the human body, which is easy to affect the blood supply of the myocardium, increasing the risk of cardiovascular and cerebrovascular diseases.