Scientists have their own set of theories to explain how to live longer.

A 2019 study published in the Proceedings of the National Academy of Sciences found that the level of a rare immune cell in the blood of super centenarians may be above average, helping them fight the disease, Live Science previously reported. These cells, called CD4 CTLs, are auxiliary T-cells that directly attack infected cells and cancer cells. In the study, about 2.8 percent of the young participants' auxiliary T-cells were CD4 CTLs, compared with up to 25 percent of the super-centenarians in the study.

In addition, specific genes may be associated with longevity. The study found that mutations in the ABO, CDKN2B, APOE and SH2B3 genes may be more common among centenarians than in the general population. These mutations may help reduce the risk of certain age-related diseases, such as heart disease and Alzheimer's disease.

In addition to biological reasons, lifestyle and psychological factors can also help people live longer lives. Studies have shown that optimistic people tend to live longer than pessimistic people. This may be because optimistic attitudes help foster healthy habits and increase resistance to unhealthy behaviors.

Some diets are also associated with longevity, but the scientific basis behind how a low- or moderate-carbohydrate diet extends life and works in which populations remains unclear.

It seems that wanting to live a long life requires not only "innate advantage", but also the effort of the day after. If you want to exceed the average life expectancy and maximize life expectancy, here are a few suggestions to refer to:

1. Keep exercising

Studies have shown that people who maintain regular exercise habits live longer than the regional average. Regular exercisers had a 30-60 percent lower risk of mortality than sedentary people. This association was also found in older groups, where the risk of death was lower even for mild activity than for sedentary people.

2. Eat healthily

Despite the debate over the best diet to extend life, almost every diet agrees: eat more vegetables. Also, do not smoke or drink too much alcohol. Whole vegetarian may not be healthy, meat may not be fat, from the diet, balanced diet is a light diet, vegetarian combination.

3. Stay optimistic and learn to manage stress

Stress can have adverse effects on the body and can lead to poor eating habits, such as overeating or smoking and drinking. Some studies have shown that optimism is a good predictor of longevity, and optimists are more resistant to stress, live longer and are healthier than pessimists. Neuroscientist Tully Sharoth says evolution has chosen optimism precisely because, in general, positive expectations increase the chances of survival.

4. Cultivate good interpersonal relationships

Caring for your family and caring for others. Good socializing and quality interpersonal relationships can help people reduce stress. People who are satisfied with their relationships may live longer than those who are dissatisfied with or lose social relationships.

Studies have found that lonely people are more likely to have high blood pressure, elevated inflammatory markers, and increased blood clotting. Among those exposed to cold viruses, more people with less social connections were less likely to actually get sick than those with less social connections.

5. Get enough sleep

Most people feel better about their sleep after 7-9 hours of sleep a night. People who live longer tend to have higher sleep quality, which is a sign of good health. Many people suffer from impaired health during the development of the disease, and poor sleep quality and insomnia are among the symptoms.