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American Journal of Clinical Nutrition, Vol 50, 1176-1181, Copyright © 1989 by The American Society for Nutrition

Changes in total body water with age

Dale A Schoeller 1

1 From the Department of Medicine, University of Chicago, Chicago, IL

Extensive cross-sectional studies demonstrate a diminution of total body water in elderly and very old subjects. These findings are supported by less extensive longitudinal studies. Cross-sectional studies indicate that the decrease in total body water is mainly due to decreased intracellular water, but this is not supported by the findings of longitudinal studies. Despite the observed changes in total body water, both animal and human studies indicate little or no change in the relationship between total body water and fat-free mass with aging.

Key Words: Intracellular water • extracellular water • hydration of fat-free mass






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Copyright © 1989 by The American Society for Nutrition