title: Obligatory urinary and faecal nitrogen losses in young Chilean men given two levels of dietary energy intake.
abstract: 1. The obligatory nitrogen losses were measured in young adult males of the low socio-economic group, consuming an N-free diet at 192 kJ (46 kcal)/kg per d from day 1 to 10 and 243 kJ (58 kcal)/kg per d from day 11 to 18. 2. All subjects, except one, lost weight compatible with N loss. 3. A kinetic evaluation of the results showed that the asymptotically derived urinary N loss after stability had been reached was 35.8 mg N/kg per d. The mean time to stability was 6.5 d. The subjects showed a trend toward decline in N loss while consuming the high-energy N-free diet. 4. The obligatory faecal N loss for days 1-10 was 16.1 mg N/kg per d and 8 mg N/kg per d for days 11-18. 5. Based on the factorial approach the total obligatory N loss of our subjects, for the initial 10 d, was 57.5 mg N/kg per d.
mesh_terms: D000328:Adult; D001835:Body Weight; D002677:Chile; D004032:Diet; D004734:Energy Metabolism; D005243:Feces / Q000032:analysis*; D006801:Humans; D008297:Male; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism* / Q000652:urine; D013997:Time Factors
chemical_list: D009584:Nitrogen