Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine] · 1989
[Serum vitamin A levels of radar operators and effects of supplementary vitamin A].
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Chen D S
Аннотация
This paper reports serum vitamin A (VA) content of 28 radar operators, and the effects of supplementation VA were studied by means of observing change of serum VA level and objective dark adaptation time. The results indicated, with respect to serum VA content, 14.3% of radar operators had a deficient level (less than 10 micrograms%), whereas 57.2% of radar operators had a low level (less than 20 micrograms%). There were 39.3% of radar operators who had a low level on nineteenth day and 92.9% of radar operators who had a acceptable value on twenty-eighth day after oral VA supplementation VA of 3,000 IU, suggesting that supplementation VA of 3,000 IU to radar operators with VA malnutrition for about one month is necessary. A certain correlation between serum VA level and objective dark adaptation time was also observed.