[Evaluation on the dietary iron absorption by young Tibetan men using stable isotopic tracer].
OBJECTIVE
The study was aimed to evaluate the iron absorption in the Tibetan man's diet using the stable isotopic iron, and present a reference to improve the dietary iron absorption for Chinese.


METHODS
In the study conducted on the spot of high altitude (> 3500m), the iron tracer (FeSO4 enriched with 57Fe) and the recovery indicator dysprosium (Dy) were orally administrated to 16 young Tibetan men, and their feces were sampled. The ratios of 57Fe/56Fe in fecal samples was determined by inductively coupled plasma mass spectrometry, and then the iron absorption was calculated based on the principle of isotope dilution.


RESULTS
The rate of dietary iron absorption in young Tibetan men was 13.4% +/- 6.4% with good linear correlation between daily fecal excretions of iron tracer and Dy.


CONCLUSIONS
Dy had the same behavior as non-absorbed iron tracer in the digestive tract and the recovery of Dy may indicate the completeness of fecal collection. Dietary iron absorption in the adult Tibetan man was relatively high.
Zhou
Ji-Chang
JC
Department of Nutrition and Food Hygiene, West China School of Public Health, Sichuan University, Chengdu 610041, China.
Huang
Cheng-Yu
CY
Zhang
Hui-Min
HM
Liu
Xiao-Li
XL
Yang
Xiaoguang
X
Pu
Jianhua
J
Jia
Qing
Q
Hong
Junrong
J
D000293:Adolescent; D004419:Dysprosium; D005243:Feces / Q000737:chemistry; D006801:Humans; D007408:Intestinal Absorption / Q000502:physiology*; D007422:Intestines / Q000502:physiology; D007503:Iron Isotopes; D019266:Iron, Dietary / Q000493:pharmacokinetics*; D007553:Isotope Labeling; D008297:Male; D018609:Tibet; D055815:Young Adult
D007503:Iron Isotopes; D019266:Iron, Dietary; D004419:Dysprosium