Sources and hazards of heavy metals in cigarettes

　　Heavy metals exceeding the standard are harmful

　　One-time poisoning of the body is basically impossible, but chronic poisoning is extremely easy
　　
　　Among the 109 chemical elements, 83 are metals, and metals with a density above 5 are collectively called heavy metals. Heavy metals such as lead, cadmium, and arsenic are very harmful. Once they enter the human body, they are excreted through a very slow process. If you smoke 20 cigarettes a day, your body will absorb about 3.2 micrograms of cadmium in an average day, which is not enough to cause immediate harmful symptoms. …[detailed]
　　
　　But if you smoke every day, it will be like slowly accumulating toxins in the human body. Over time, the harm to the body is self-evident.
　　
　　Heavy metals enter the body along with smoke, and the largest amounts of cadmium and lead are absorbed.

　　In cigarette smoke, heavy metal compounds exist in a form called aerosol, and then enter the body along with the smoke. Domestic scholars have conducted relevant research and found that the most easily absorbed heavy metal in the smoke of a cigarette is cadmium, followed by lead. About 46.4% of the cadmium and 26.4% of the lead in a cigarette will enter the lungs. (According to "Discussing the Harm of Smoking from the Changes in Trace Element Content in Cigarettes Before and After Smoking" Spectroscopy and Spectral Analysis 2007.9) According to the brand of cigarettes with the highest cadmium content, one gram contains 5.4 micrograms of cadmium, and a pack of cigarettes has about 14 grams of cut tobacco, so smoking a pack of cigarettes will inhale 35 micrograms of cadmium. It takes almost three months for enough cadmium to accumulate in the body to be harmful.
　　
　　Heavy metals cause a variety of disease , may also cause cancer

　　Heavy metals may cause various diseases, such as cadmium causing high blood pressure and cardiovascular and cerebrovascular diseases.； Destroys bones, liver and kidneys, and causes kidney failure ； Lead is one of the more toxic types of heavy metal pollution and will be difficult to eliminate once it enters the human body. Can directly damage human brain cells, especially fetus of nerve System, can cause congenital mental retardation. Arsenic, a component of arsenic, is highly toxic and can cause rapid death. Long-term exposure to small amounts can lead to chronic poisoning. It is also carcinogenic. Any of these heavy metals can cause headaches, dizziness, insomnia, forgetfulness, confusion, joint pain, stones, cancer . It is worth mentioning that heavy metals in second-hand smoke are also very harmful.