[Zinc and magnesium balance in long-term infusion of carbohydrates in healthy subjects].

According to their physiological importance magnesium and zinc have to be infused during complete parenteral nutrition. 8 male volunteers obtained a continous infusion of a solution of carbohydrates combined with amino acids over a period of 12 hours. In this period 18-24 mval Mg and 9-12 mg Zn were infused. In another experiment 7-10 vmal Mg were applicated, but no zinc. Magnesium and zinc concentrations in serum and urine were determined by atomic absorption spectrophotometry. The results gained in this period showed a positive balance with the applicated amounts of magnseium and zinc. The excretion of both elements in urine were extremely high while no significant changes in serum concentration were detectable. In our opinion the infusion rate could be reduced especially for zinc.