A study disproves claims that "nicotine" causes cancer--part1
Jun 14, 2022
Everyone knows that "smoking is harmful to the body". Why are cigarettes harmful to the body? I believe most people will think that it is "nicotine" in cigarettes. This is why many countries are against cigarettes and e-cigarettes. In everyone's cognition, "nicotine" not only harms human health, but also causes cancer. But a study from Rutgers University in New Jersey appears to disprove the claim that "nicotine" causes cancer.
Does nicotine in cigarettes cause cancer?
Nicotine is the main ingredient of cigarettes and is listed as a carcinogen by many oncologists.
Nicotine does not cause cancer, is smoking harmful to health a "big scam"?
Since neither Rutgers University of New Jersey nor the World Health Organization has clearly stated that "nicotine" is carcinogenic, can the statement that "smoking is harmful to the body" cannot be established?
Not really. Although the nicotine in cigarettes does not directly cause cancer in smokers, long-term inhalation of a large amount of nicotine will cause people to develop a kind of "dependence" and become addicted to smoking, which will ultimately increase the risk of cancer.
According to the composition table of cigarettes, it is known that nicotine is not the only substance in cigarettes, cigarettes also contain certain tar, benzopyrene and other substances, as well as carbon monoxide, nitrous acid and other substances produced after lighting cigarettes, which will increase the risk of cancer. probability.
- Carbon monoxide
Although carbon monoxide in cigarettes is not directly carcinogenic, ingesting large amounts of carbon monoxide can cause poisoning in humans. Because carbon monoxide will destroy the blood's transport of oxygen, resulting in hypoxia in the human body; in addition, it will combine with hemoglobin in the blood, resulting in symptoms of poisoning.
Excessive inhalation of carbon monoxide will increase the cholesterol content in the body, and excessive cholesterol concentration will increase the risk of arteriosclerosis, thereby causing cardiovascular disease.
The World Health Organization lists benzopyrene as a first-class carcinogen. Long-term intake of excessive amounts of benzopyrene will slowly cause damage to the lungs, thereby increasing the risk of lung cancer.
A cigarette contains about 6-8 mg of tar. Tar has a certain carcinogenicity. Long-term intake of excessive tar will cause damage to the lungs, affect lung function, and increase the risk of lung cancer.
- Nitrous acid
Cigarettes produce a certain amount of nitrous acid when they are lit. However, nitrous acid has long been listed as a first-class carcinogen by WHO. Long-term intake of excessive nitrous acid is bound to affect health, thereby increasing the risk of cancer.
From the above content, we know that even if nicotine does not directly cause cancer, smoking for a long time will still increase the risk of cancer. Therefore, smoking is not a "big scam" that is harmful to health.
In life, most people think that "smoking = cancer", long-term smoking will increase the risk of lung cancer, non-smokers will not develop lung cancer, not the case. People who don't smoke don't mean they won't get lung cancer, but the risk of developing lung cancer is much lower than that of smokers.
So, who is more likely to develop lung cancer between long-term smokers and non-smokers?