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- Davidsson L, Almgren A, Juillerat MA, Hurrell RF
- Am J Clin Nutr 1995 Nov 62:5 984-7
- Abstract
- The absorption of manganese from soy formula was studied in
adult volunteers by extrinsic labeling of test meals with 54Mn,
followed by whole-body retention measurements for approximately
30 d after intake. Eight subjects participated twice in each of
the two studies, acting as his or her own control. Soy formula
containing the native content of phytic acid was compared with
a similar dephytinized formula: geometric mean manganese absorption
increased 2.3-fold from 0.7% (range: 0.2-1.1%) to 1.6% (range:
1.0-7.2%) (P < 0.01) with the dephytinized formula. In addition,
the effect of the ascorbic acid content of the phytic acid-containing
formula was investigated. Manganese absorption was not influenced
by an increase in the ascorbic acid from 625 mumol/L (110 mg/L)
to 1250 mumol/L (220 mg/L): the geometric mean manganese absorption
was 0.6% (range: 0.3-1.0%) and 0.6% (range: 0.3-1.1%), respectively.
In conclusion, fractional manganese absorption was approximately
doubled by the dephytinization of soy formula but was not influenced
by an increase in the ascorbic acid content of a soy formula containing
the native amount of phytic acid.
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