Aging has been studied for a long time, but the number of people aged 60 years and over is increasing. So, for 2019, according to the World Health Organization (WHO), the number of older people is about one billion, with a forecast by 2030 - up to 1.4 billion. With increasing life expectancy and the proportion of older people, health systems and social stability are being placed under additional strain. Humanity is faced with the task of finding new methods for maintaining the quality of life (age-related vitality), diagnosing aging processes for the formation of preventive measures. Biomarkers of aging in this case are more relevant than ever. Of particular interest is interleukin-6 (IL-6). An increase in the concentration of IL-6 is characteristic of the aging process and may reflect age-associated changes even in relatively healthy people of older age groups, so this cytokine was called the “cytokine for gerontologists”.