In a new study, an international group of scientists from Stanford University and the Chinese University of Hong Kong focused on studying the "biological" age of a person and the factors that increase it.

The Guardian writes about it.

It is known that there are two ages: chronological - which can be learned from the data recorded in the passport, and biological - based on the aging of the body's functions.

The latter is influenced by genetics, lifestyle and a number of other factors that make our bodies age faster.

Specialists used the data of more than 2,500 people who had various age-related diseases.

In particular, cardiovascular diseases and lung and liver diseases.

Scientists compared the data of this category of people with healthy ones and found that the predicted age did not fluctuate by more than 1.5 years.

However, scientists drew attention to another interesting fact.

Scientists say that a person's biological age directly depends on his psychological health.

Scientists noticed that people who experienced depressive feelings or feelings of loneliness aged much faster than those who had bad habits, such as smoking.

According to the co-author of the study Fedor Galkin, people who feel unhappy, on average, show a biological age of 1.65 years more than the real one.

Scientists hope that the results obtained by them will help to learn more about the psychological health of a person and its influence on early aging.

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