This is the secret to longevity, according to science

The secret to a longer life is something that man has sought since the beginning of civilization. And despite the fact that different cultures claim to have discovered the elixir of youth, science still does not seem to give a unanimous answer on what factor determines life expectancy.

The differences that exist between countries with high and low life expectancies can be explained by economic reasons, health services, and even quality of life in general, in addition to other quantifiable factors.

However, there does not seem to be an explanation for the average life expectancy in developed countries to be 80 years and some people, even in less developed countries, reach 110 or even more.

This is where biology and other sciences step in to find out which factor is the deciding factor. Is longevity encoded in DNA? Or is there something else? The Science Alert portal decided to ask 11 experts in aging, cell biology, and genetics this question. This is what they discovered.

First, the scientists interpreted this question in two ways. The first interpretation refers to whether the longevity of humans compared to other species was determined by genes, while the second interpretation compares longevity between humans.

When comparing life expectancy between species, the answer is clear: it is determined by genetics.

And it is that the different animal species have a very varied life expectancy. Thus, we see that the Greenland shark can live up to 400 years, while some species of flies only live 5 minutes. The reason behind these differences is genetics.

The question could mean: Are the upper limits of longevity in humans as a species determined primarily by genetics? In this case, the answer is almost certainly yes. For example, the maximum life expectancy of humans is about twice that of our closest relatives among higher primates, such as chimpanzees and gorillas, said David Gems, an aging expert at University College London.

However, when analyzing longevity differences between humans there is a decisive factor: lifestyle.

The effect of lifestyle on longevity is clearly evident when we look at how average life expectancy has increased over hundreds of years due to increased accessibility to clean water, food, and healthcare, the state in Science Alert.

Contrary to intuition, restricting calorie intake has been shown to be related to longevity in humans. Another lifestyle factor is exercise. Even light exercise for 15 minutes a day has been shown to increase life expectancy by around 3 years.

If one takes [the question] to mean: differences in life expectancy between individual people are determined primarily by genetics, then the answer is extremely unlikely, says Gems, and most experts agreed. agreement.

It can be difficult to determine whether the existence of families with many very old people is due to genetics or environment since family members often adopt similar diets and lifestyles. Studying the DNA of these long-lived people could provide more information.

Many groups are trying to understand this by sequencing the DNA of centenarians and supercentenarians and doing whole-genome analysis, said Ken Parkinson, an expert in anti-aging and oncology at the Queen Mary University of London.

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