Knowledge of excretion rates of naturally occurring 210Po in non-exposed people is a prerequisite for assessment of potential internal contamination with polonium. Significant differences in published data on excretion rate of 210Po in urine have been long known. In this paper we study the differences of excretion rates of 210Po in urine of non-exposed population in detail. All available studies of this field published by the middle of 2008 (according to INIS abstracts) have been evaluated