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American Journal of Clinical Nutrition, Vol 45, 1480-1486, Copyright © 1987 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Bioavailability of zinc from zinc-histidine complexes. I. Comparison with zinc sulfate in healthy men

J Scholmerich, A Freudemann, E Kottgen, H Wietholtz, B Steiert, E Lohle, D Haussinger and W Gerok

Zinc supplementation is beneficial in some clinical conditions. Histidine has been shown to improve zinc absorption in animals. To test its influence on zinc absorption in humans, we studied the bioavailability of zinc from zinc-histidine complexes as compared to zinc sulfate in 10 healthy volunteers. Ingestion of zinc complexed with histidine at a ratio of 1:2 or 1:12 increased serum-zinc concentration 25% more than ingestion of zinc sulfate. Calculated uptake was 30-40% increased with zinc histidine over zinc sulfate. Urinary excretion was not different with any preparation. Application of 15 mg zinc as zinc histidine 1:2 gave an identical serum-zinc response as 45 mg zinc taken as zinc sulfate. Zinc histidine complexes are better absorbed than zinc sulfate in humans.


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[Abstract] [Full Text]


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Copyright © 1987 by The American Society for Nutrition