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American Journal of Clinical Nutrition, Vol 50, 825-829, Copyright © 1989 by The American Society for Clinical Nutrition, Inc


ORIGINAL RESEARCH COMMUNICATIONS

Riboflavin status of adolescent vs elderly Gambian subjects before and during supplementation

CJ Bates, HJ Powers, R Downes, D Brubacher, V Sutcliffe and A Thurnhill
MRC Dunn Nutrition Unit, Cambridge, UK.

Riboflavin status was measured by activation coefficient of erythrocyte glutathione reductase (EGRAC) in elderly and adolescent rural Gambians whose intakes were low. Fifty-one adolescents and 52 elderly subjects were each subdivided into six supplementation groups to receive 0.25, 0.5, 0.75, 1.0, 1.5, or 2.5 mg riboflavin/d on 5 consecutive days weekly for 5 wk. Before supplementation, EGRAC values were grossly abnormal and differed (p less than 0.005) between the two female groups [elderly subjects, 1.94 +/- 0.33 (means +/- SD); adolescents. 1.72 +/- 0.27] but not between the two male groups. With supplementation greater than 0.25 mg/d the values became nearly equal in the two age groups. Only at total intakes between 1.8 and 2.5 mg riboflavin/d did the subjects attain acceptable status, with a mean EGRAC of 1.3-1.4. Clearly there is a need for further study of the discrepancy between observed index values during supplementation and the accepted ranges of normality at intakes close to the recommended amounts.


This article has been cited by other articles:


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S. Mushtaq, H. Su, M. H. Hill, and H. J Powers
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Quantification of the bioavailability of riboflavin from foods by use of stable-isotope labels and kinetic modeling
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Am. J. Clin. Nutr.Home page
H. J Powers
Riboflavin (vitamin B-2) and health
Am. J. Clinical Nutrition, June 1, 2003; 77(6): 1352 - 1360.
[Abstract] [Full Text] [PDF]




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