The article presents the results of research on the cardiac troponin I level as determined by a highly sensitive method in ahealthy population. A total of 165 people (coworkers at a medical institution, 71% women and 29% men) were examined. The criterion for inclusion was the absence of health complaints at the time of the survey and during the previous 30 days. All of the examinees were divided into three age groups: 18–34 years (the first period of middle age); 35–54 years (the second period of the middle age); older than 55 years (old age). The main goal of the study is to identify the absence or presence of a significant correlation between the level of cardiac troponin I and the age of conditionally healthy examinees.