[Study on the dietary protein bioavailability by young men of Yi and Tibetan].
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.
Zhou
Ji-chang
JC
Huaxi School of Public Health, Sichuan University, Chengdu 610041, China.
Huang
Cheng-yu
CY
Hong
Jun-rong
JR
Wei
Da-ying
DY
Li
Qiongzhen
Q
Jia
Qing
Q
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
D004044:Dietary Proteins; D009584:Nitrogen