Iron and zinc absorption in human subjects from a mixed meal of extruded and nonextruded wheat bran and flour.
The effect of extrusion cooking of a bran-flour mixture on iron and zinc retention was measured in normal adults. The stable isotopes 58Fe (1.253 mg) and 67Zn (5.13 mg) were administered with 40 g nonextruded or extruded cereal with milk and isotopic retention was measured from fecal excretion over the next 4-7 d by neutron-activation analysis (Fe) and fast-atom-bombardment mass spectrometry (Zn). 58Fe retention was 15.1 +/- 2.4% (means +/- SEM) with the nonextruded meal and 16.5 +/- 2.7% with the extruded meal. 67Zn retention was 18.9 +/- 1.7% with the nonextruded meal and 18.3 +/- 1.5% with the extruded meal. Extrusion cooking had no effect on 58Fe or 67Zn retention.
Fairweather-Tait
S J
SJ
AFRC Institute of Food Research, Norwich Laboratory, UK.
Portwood
D E
DE
Symss
L L
LL
Eagles
J
J
Minski
M J
MJ
D000328:Adult; D004032:Diet; D004043:Dietary Fiber / Q000032:analysis; D005243:Feces / Q000032:analysis; D005260:Female; D005433:Flour; D006358:Hot Temperature; D006801:Humans; D007501:Iron / Q000032:analysis / Q000493:pharmacokinetics*; D008297:Male; D013058:Mass Spectrometry / Q000379:methods; D009501:Neutron Activation Analysis; D014908:Triticum; D015032:Zinc / Q000032:analysis / Q000494:pharmacology*
D004043:Dietary Fiber; D007501:Iron; D015032:Zinc