Factors Influencing Calcium Balance in Man

  • Herta Spencer
  • Lois B. Kramer


Calcium balance studies are time-consuming and tedious to perform. They also require strictly controlled study conditions, namely a constant dietary intake, completeness of collections of excreta, analyses of calcium intake as well as urinary and fecal excretions. These balances have to be determined for relatively long periods of time in order to obtain interpretable data because of the time required for adaptation to a given calcium intake. Another reason for employing long-term balance studies is the fact that passage of minerals, including calcium, through the intestine may be considerably delayed [2,38]. Despite these difficulties and the unavoidable errors inherent in determining calcium balances, the state of calcium metabolism can be quite reliably assessed by determining the intake and excretion of calcium in urine and stool. The loss of calcium in sweat is usually not monitored, and calcium balances must therefore be considered as maximal values.


Calcium Intake Phytic Acid Urinary Calcium Calcium Metabolism Calcium Balance 
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Copyright information

© Plenum Press, New York 1985

Authors and Affiliations

  • Herta Spencer
    • 1
  • Lois B. Kramer
    • 1
  1. 1.Metabolic SectionVeterans Administration HospitalHinesUSA

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