Using the enzymatic test based on measurement of glutathione reductase activity in haemolysates the vitamin B2 nutrition status was assessed twice at an interval of 5 years in 57 elderly women and 42 men living in family homes in Warsaw. The first study was carried out in 1992 when the study group had reached the age of 70 years, the second study was done in 1997 when the age of 75 years had been reached by the group. Normal vitamin B2 nutrition status (a BGR < 1.20) was found in 1997 in a greater proportion of the study group (96.5% women and 100% men) as compared to the results in 1992 (86.0% women and 78.6% men). The medium vitamin B2 deficiency risk (a BGR = 1.20-1.28) was found in 1992 in 8.7% women and 14.3% men, while in 1997 it was noted in only 3.5% of women. In 1997 no case of high deficiency risk was found (a BGR - 1.29 or more) while in 1992 it was demonstrated in 5.3% and 7.1% of women and men respectively. The analysis of history data concerning vitamin B2 supplements intake showed that the proportion of persons taking those supplements has risen from 17.5% in 1992 to 21.1% in the group of women and from 19.0% to 33.3% in the group of men between 1992 and 1997.
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