Toenails can be a precursor to the diagnosis of lung cancer

A research team from the University of San Diego in California said that toenails can be a precursor to the diagnosis of lung cancer.

It is reported that they studied the content of nicotine in toenails and found that people with high nicotine content have a three-fold higher risk of lung cancer than people with low content.

What is shocking is that among the people who were tested, some people had high levels of nicotine in their toenails, but never had a history of smoking. Experts say this proves that smoking second-hand smoke is harmful to the human body.

A person's toenails only grow by one centimeter per year. This growth rate is much slower than that of fingernails. Therefore, it is better to determine whether nicotine has invaded the toenails.

The research team spent 12 years tracking the health of 850 people. They found that high levels of nicotine in toenails can also increase the incidence of heart disease.

According to the statistics of the World Health Organization, there are an estimated 1.2 million new cases of lung cancer worldwide each year and about 1.1 million deaths. On average, people die of lung cancer every 30 seconds, and 90% of lung cancer is caused by smoking.

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