[Determinations of magnesium, iron and copper in the saliva of healthy subjects].

In 70 healthy subjects aged from 7 to 60 years centrifuged mixed, resting saliva obtained before breakfast was analysed for the presence of magnesium, iron and copper. The studied group was divided into three subgroups: I--7 to 14 years, II--18 to 28 years, and III--from 48 to 60 years. Significant age-related differences were found in the magnesium content between group I and II and between I and III. No statistically significant differences were observed in the content of iron and copper, and in the values of the iron-copper index between the analysed subgroups depending on sex and on age.