Article is about troponin I testing by high sensitive method in healthy population group. 165 people (employees of hospital) were examined, 71 % - women and 29 % - men. Inclusion criteria were as follows: absence of active complaints at the time of health examination and during the previous 30 days. All the examinees were divided into three age groups: 18-34 years (middle age, I period), 35-54 years (middle age, II period), above 55 years (old age). Research of correlation between cardiac troponin I and age of healthy population group was the main aim of investigation.