| ironjustice@aol.com 2006-01-02, 6:08 pm |
| Below .. PROOF ..
The following study shows clearly .. due to previous studies which left
isotopes in the study group .. 1.46 mg/d for males and 1.15 mg/d for
females to be the loss / required intake for a growing adolescent.
This is about 5-10 times less than what is currently recommended .. ?
Recommended Dietary Allowances for Iron for Infants (7 to 12 months),
Children, and Adults
Ages Male (mg) Female (mg)
9-13 years 8mg/d 8mg/d
14-18 years 11 mg/d 15 mg/d
<<snip>>
the requirement for absorbed iron was estimated to be 1.46 mg/d for
males and 1.15 mg/d for females.
<<snip>>
Which seems even at the low of 8 to be MUCH higher than required .. ?
http://www.beefinfo.org/bh_iron.cfm
And since a growing adolescent is the SAME .. basically .. as an adult
in REQUIRED iron .. according to the same .. researchers .. then one
might .. presume .. the calculations for REQUIRED iron in an adult ..
may ALSO .. be .. skewed / wrong .. ?
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=AD=AD?-----------
Inevitable iron loss by human adolescents, with calculations of the
requirement for absorbed iron.
Fomon SJ, Drulis JM, Nelson SE, Serfass RE, Woodhead JC, Ziegler EE
Department of Pediatrics, university of Iowa, Iowa City, IA and.
Department of Preventive Medicine and Community Health, university of
Texas Medical Branch, Galveston, TX.
[Medline record in process]
In growing individuals, the requirement for absorbed iron consists of
iron needed for growth and iron needed to replace inevitable iron loss.
We were able to estimate inevitable iron loss by adolescents because
total body iron of the adolescents had been enriched with the stable
isotope, (58)Fe, as the result of earlier studies of iron absorption.
During an interval beginning at least 1.56 y after isotope
administration (a time sufficient for complete mixing of the isotope
with total body iron) and extending for no less than 3.29 y, we
determined the isotopic enrichment of circulating iron. On the basis of
several assumptions, we calculated total body (58)Fe and total body
iron at the beginning and end of the interval. Because of complete
mixing of the isotope with total body iron, fractional total (58)Fe
loss was the same as fractional loss of total iron. In males, the
fractional loss of iron was 9.70%/y and the quantitative loss was 256
mg/y or 0.70 mg/d. In females, the fractional loss of iron was 14.60%/y
and the quantitative loss was 306 mg/y or 0.84 mg/d. Using several
assumptions, we then calculated that the iron requirement for growth
during this interval was 0.76 mg/d for males and 0.31 mg/d for females.
Adding the iron loss to the iron requirement for growth, the
requirement for absorbed iron was estimated to be 1.46 mg/d for males
and 1.15 mg/d for females.
PMID: 12514285, UI: 22401955
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