Biological age, as opposed to chronological age, is a concept used to describe the state of an organism. An average healthy individual’s biological generally corresponds to their chronological age. But with age, these two indicators are likely to become mismatched due to environmental factors, bad habits, manifestations of hereditary diseases, and other causes. So far, there is no established method of predicting biological age. Medical and scientific researchers are looking for a marker that could accurately and consistently reflect biological age.