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American Journal of Clinical Nutrition, Vol 57, 344-352, Copyright © 1993 by The American Society for Clinical Nutrition, Inc


ORIGINAL RESEARCH COMMUNICATIONS

Growth and body composition of periurban Guatemalan children in relation to zinc status: a longitudinal zinc intervention trial

KR Cavan, RS Gibson, CF Grazioso, AM Isalgue, M Ruz and NW Solomons
Division of Applied Human Nutrition, University of Guelph, Ontario, Canada.

Changes in growth, body composition, and zinc indexes were evaluated after 25 wk in a double-blind zinc-supplementation study of 162 periurban Guatemalan children aged 81.5 +/- 7.0 mo (mean +/- SD). Children receiving the zinc supplement (10 mg Zn/d as amino acid chelate) for 90.1 +/- 9.2 d had higher mean fasting plasma zinc (16.2 +/- 2.9 vs 14.9 +/- 2.1 mumol/L, P < 0.01), a greater increase in median triceps skinfold Z score (0.50 vs 0.38, P < 0.05), and a smaller deficit in median midarm circumference (MAC) Z score (-0.03 vs -0.20, P < 0.05) compared with the placebo group. Initial hair zinc classified as < 1.68 and > 1.68 mumol/g was the only laboratory variable that explained some of the variance in final Z scores of midarm-muscle area (P < 0.05) and MAC (P < 0.01). Children responded to the zinc supplement with changes in indexes of body composition rather than growth.


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