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  • Title: Endogenous nitrogen excretion in male highlanders of Papua New Guinea.
    Author: Fujita Y, Okuda T, Rikimaru T, Ichikawa M, Miyatani S, Kajiwara NM, Yamaguchi Y, Oi Y, Koishi H, Alpers MP.
    Journal: J Nutr; 1984 Nov; 114(11):1997-2002. PubMed ID: 6491755.
    Abstract:
    Endogenous nitrogen excretion was examined in highlanders of Papua New Guinea. Eight highlanders were fed a semisynthetic protein-free diet with about 49 kcal/kg of energy for 11 days. At the end of this period they excreted 29.2 +/- 4.0 mg N/kg of urinary nitrogen and 13.9 +/- 2.5 mg N/kg of fecal nitrogen per day. When the values were expressed per basal metabolic rate (BMR), they were 1.25 +/- 0.19 mg N/kcal BMR for urine and 0.59 +/- 0.08 mg N/kcal BMR for feces. The total amount was calculated as 43.1 +/- 4.3 mg N/kg (1.84 +/- 0.18 mg N/kcal BMR). Endogenous urinary nitrogen excretion in highlanders was the lowest so far reported; the effects of ethnic and nutritional backgrounds on obligatory urinary N loss were examined but no clear explanation was found for the highlanders' low value.
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