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  • Title: Simple method for monitoring 24-hour urinary urea nitrogen excretion.
    Author: Middendorf DF, Hebert LA, Zager RA, Hartman J, Bitzel D.
    Journal: J Lab Clin Med; 1986 Dec; 108(6):577-80. PubMed ID: 3783028.
    Abstract:
    The urine urea nitrogen/urine creatinine excretion ratio (UUN/UCr) of a "spot" urine specimen obtained approximately 5 hours after the last meal of the day can be used to accurately calculate the urinary urea excretion for the previous 24-hour period. Because UUN excretion is largely determined by dietary intake of protein nitrogen, this method can be used to estimate dietary protein intake for the previous 24-hour period. Strategies for using this simple method for inexpensively and continuously monitoring dietary protein intake are discussed.
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