Objective In order to determine zinc absorption and utilization from diet in Tibetan male adults, and to lay a foundation for the revision of Chinese Dietary Reference Intakes(DRIs)and improvement of zinc nutrition.
Methods Thirteen Tibetan healthy menaged eighteen~nineteen were selected to take part in a fourteen day metabolic balanced experiment, and to be served a three day representative dietafter the nutritional survey.During the experimental days, test meals, water, feces and uine were collected.Zinc content in the above samples was deter mined by means of flameatomabsor ption spectrum(AAS).Then zinc apparent absorption and apparent utilization were calculated.
Results Zinc apparentabsor ption and apparent utilization was 24.15 and 7.61 percent respectively, and the former was quite close to the estimated value of present DRIs foundation.
Conclusion Zinc intake from repr esentativediet could meet the requirement of the subjects.
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