[Melatonin and man aging in the European part of the Arctic zone of the Russian Federation.].

The analysis of 6-sulfatoxymelatonin (6-SMT) levels in working-age men (aged 19-69) who live in the European part of the Arctic zone of the Russian Federation is presented. Their urine 6-SMT levels were similar to those of comparison group (residents of Western Siberia). The level of 6-SMT decreased with age and was the lowest in 40-49-year group.