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American Journal of Clinical Nutrition, Vol 13, 186-193, Copyright © 1963 by The American Society for Clinical Nutrition, Inc.

Studies of Serum Carotenoids and Vitamin A in Iowa School Children

CHARLOTTE E. RODERUCK PH.D.1, VIRGINIA D. SIDWELL PH.D.2, EMIL H. JEBE PH.D.3, and ERCEL S. EPPRIGHT PH.D.4

1 Professor, Food and Nutrition Department, College of Home Economics, Iowa State University, Ames, Iowa
2 Nutrition Specialist, Technological Laboratory, Bureau of Commercial Fisheries, Ann Arbor, Michigan
3 Research Mathematician, Institute of Science and Technology, University of Michigan, Ann Arbor, Michigan
4 Professor and Assistant Dean, College of Home Economics, Iowa State University; and Assistant Director, Iowa Agricultural and Home Economics Experiment Station, Ames, Iowa

The serum concentration of carotenoids and vitamin A has been reported for a state-wide survey of about 650 school boys and girls in Iowa and for about 200 girls participating in a longitudinal study. The serum concentration of vitamin A increased with age in both samples. In the survey, the concentration of serum carotenoids appeared to decrease with age; however, the total vitamin A value also decreased with age when it was computed as intake per kilogram body weight. A significant correlation coefficient of 0.30 existed between concentration of serum carotenoids and vitamin A value from fruits and vegetables per kilogram body weight per day. The data from the longitudinal study indicated little fluctuation in serum carotenoids with age for girls whose dietary habits were unchanged. However, serum carotenoids values were lower in the spring compared with those in the fall. When foods rich in vitamin A and its precursors were added as supplements during the winter months to the diets of a similar group of girls, seasonal fluctuation was eliminated.

Considerable variation between serum concentrations of both vitamin A and carotenoids was observed when data collected within six months of each girl's birthday were analyzed. Hence, repeated measurements of serum carotenoids are necessary to assess the true status of any one subject with respect to this nutrient. A poor serum concentration of carotenoids was not accompanied by a poor concentration of vitamin A.






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Copyright © 1963 by The American Society for Nutrition