Is there any scientific basis for saying that you smoke and drink until you are 99?

Smoking and drinking to live to 99 years old is not against science, but it is generally only a few cases. It is better to say that there are very few people who can live to the age of 100 in modern times, and there is not much reference value. In order to live longer, they must not follow that life.

Modern smoking and drinking have been proved to be a factor affecting life expectancy. The probability of smokers suffering from lung cancer is several times higher than that of non-smokers. Excitative substances in tobacco can cause vascular tension, which may lead to chronic diseases such as hypertension in the long run, and hypertension is related to diseases such as cerebral hemorrhage. Alcohol has been proved to be a carcinogenic factor, which can increase the incidence of cancer, make nerve paralysis and lead to higher incidence of accidents such as car accidents. Disease is related to longevity, that is, both factors affect longevity.

Frequent smoking or drinking in a short period of time may not necessarily lead to adverse changes in the human body, because human organs and tissues can compensate within a certain range and try their best to eliminate harmful factors to the human body. However, if the intake of harmful factors is too high, the human body can't afford compensation, which will lead to premature death at the expense of affecting the normal function of the human body, making the life expectancy of people lower than that of modern humans, and may also offset the increase in life expectancy brought about by the development of modern medical technology.

Smoking and drinking live to 99. There are quite a few cases in real life, such as some celebrities and great men in China, but it does not affect longevity, mainly because health monitoring is relatively perfect. There are also many long-lived elderly people among the people, who maintain some health disadvantages confirmed by modern science. However, some modern studies believe that the long-lived elderly usually have a gene that slows down the aging of the elderly, but this gene can not be achieved through simple mutation. It is a specific gene, not random.

So many cases we can see are based on the overall population of 7.5 billion people. On average, in every region, there are very few people who can live to be 99 years old or even 100 years old, and no one in 1000 people can live that long.

Based on epigenetics and other research, scientists can better predict the life expectancy of people in a certain area, which refers to the average life expectancy that may be obtained under the conditions of modern medical technology, and does not mean that the actual average life expectancy can reach that age. So we see that some people get 120 years old, and some people die suddenly at the age of 30.

People's life span varies greatly from individual to individual, and the life span of others has no reference value for themselves. We can't think this is right just because others have been smoking and drinking for a long time. Generally speaking, the distribution of human life expectancy is a bit like a normal distribution, with a large middle population and few people who die early and live long.