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American Journal of Clinical Nutrition, Vol 52, 564-567, Copyright © 1990 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Biochemical evidence suggestive of suboptimal zinc and vitamin A status in schoolchildren in northeast Thailand

E Udomkesmalee, S Dhanamitta, J Yhoung-Aree, N Rojroongwasinkul and JC Smith Jr
Institute of Nutrition, Mahidol University, Salaya Nakorn Pathom, Thailand.

Data are accumulating that support the hypothesis that inadequate zinc nutriture will result in an impairment of vitamin A utilization. Therefore, zinc and vitamin A status were assessed in 283 schoolchildren aged 7-13 y in Northeast Thailand. More than one-fourth had serum vitamin A concentrations less than 0.86 mumol/L , with a mean (+/- SD) concentration of 1.06 +/- 0.31 mumol/L compared with 1.26 +/- 0.02 mumol/L for US children of similar age. Seventy percent had low serum zinc concentrations, less than 10.7 mumol/L. Twenty-three percent of the children exhibited both low serum zinc and vitamin A concentrations. The mean concentration of retinol-binding protein (RBP) was lower for children in this study compared with healthy Thai children in Bangkok, 22.5 +/- 6.6 vs 25.3 +/- 6.0 mg/L, respectively. Serum zinc and RBP were significantly correlated (p less than 0.001) whereas vitamin A and zinc were not correlated. These data suggest that a high proportion of rural schoolchildren in Northeast Thailand are at risk of inadequate zinc and/or vitamin A nutriture.


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