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Assessing hydration status.

Stavros A Kavouras1

  • 1Laboratory of Nutrition and Clinical Dietetics, Department of Nutrition and Dietetics, Harokopio University, Athens, Greece. skav@hua.gr

Current Opinion in Clinical Nutrition and Metabolic Care
|August 13, 2002
PubMed
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Accurate hydration status assessment is vital for health. While no gold standard exists, body weight changes, urine osmolality, specific gravity, and color offer reliable hydration level indicators.

Area of Science:

  • Human physiology
  • Sports science
  • Clinical diagnostics

Background:

  • Euhydration is crucial for maintaining human health across diverse situations.
  • Accurate assessment of hydration status is essential for optimal physiological function.

Purpose of the Study:

  • To review and examine existing techniques for assessing human hydration status.
  • To identify reliable indicators for monitoring hydration levels.

Main Methods:

  • Review of scientific literature on hydration assessment techniques.
  • Analysis of various physiological and biochemical markers.

Main Results:

  • Numerous indices developed over 20 years to assess hydration accurately.

Related Experiment Videos

  • Widely used markers include plasma osmolality, urine osmolality, and urine specific gravity.
  • Urine color provides a reasonably accurate estimate, comparable to laboratory methods, especially when quick assessment is needed.

    • Conclusions:

    • No single 'gold standard' exists for hydration status assessment.
    • Body weight changes, urine osmolality, specific gravity, conductivity, and color are commonly used and provide reasonable results.
    • First morning urine samples enhance the reliability of these hydration assessment indices.