title: [Study on the dietary protein bioavailability by young men of Yi and Tibetan].
abstract: OBJECTIVE
  To compare the dietary protein intakes and bioavailability of young male adults of Yi and Tibetan.
  
  
  METHODS
  Two groups of subjects aged from 18 to 22y were respectively recruited from schools of Liangshan Yi autonomous region and Tibetan-Qiang autonomous region. Samples of diet, fecal and urine in the nitrogen balance study for each group of subjects were collected, and the nitrogen content was analyzed by semi-micro-Kjeldahl.
  
  
  RESULTS
  Total protein intake, apparent absorption, true absorption, biological value, net protein utilization and nitrogen balance for the young man of Yi people were 71.55g/d, 73.19%, 79.79%, 47.58%, 38.17% and 0.71g/d. The corresponding figures for young Tibetan man were 94.33g/d, 86.69%, 91.43%, 48.07%, 44.00% and 3.16g/d.
  
  
  CONCLUSIONS
  The dietary protein intake and bioavailability of young Tibetan man were better than those of Yi, but both Yi and Tibetan young men were able to keep positive N balance with their respective dietary pattern.
authors.affiliation: Huaxi School of Public Health, Sichuan University, Chengdu 610041, China.
authors.forename: Ji-chang
authors.initials: JC
authors.lastname: Zhou
authors.forename: Cheng-yu
authors.initials: CY
authors.lastname: Huang
authors.forename: Jun-rong
authors.initials: JR
authors.lastname: Hong
authors.forename: Da-ying
authors.initials: DY
authors.lastname: Wei
authors.forename: Qiongzhen
authors.initials: Q
authors.lastname: Li
authors.forename: Qing
authors.initials: Q
authors.lastname: Jia
mesh_terms: D000293:Adolescent; D000328:Adult; D001682:Biological Availability; D002681:China / Q000453:epidemiology; D004034:Diet Surveys; D004044:Dietary Proteins / Q000493:pharmacokinetics*; D005006:Ethnicity; D005243:Feces / Q000737:chemistry; D006801:Humans; D008297:Male; D009584:Nitrogen / Q000032:analysis* / Q000652:urine
chemical_list: D004044:Dietary Proteins; D009584:Nitrogen