This study will measure nonheme iron absorption from each of the 7 daily MyPyramid menus. Such measurements will confirm whether modifications are needed to meet dietary iron recommendations and will provide data useful for validation algorithms to calculate dietary iron bioavailability.
Nonheme iron absorption is measured with 59Fe tracer added to a 1-day menu, with iron retention detected two weeks later in a whole body scintillation counter. Each subject has iron absorption measured from each of 7 1-d menus formulated to meet the US dietary guidelines (MyPyramid menus), with the order of menus randomly assigned. Each subject participates for 14 wk to test all 7 menus.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
16
Iron absorption measured from one of seven different menus fed for 1 day each, in randomized order for each subject, with feedings separated by 2 weeks
USDA Grand Forks Human Nutrition Research Center
Grand Forks, North Dakota, United States
Nonheme Iron Absorption
Absorption was estimated from whole body retention of a Iron-59 radiotracer, 2 weeks after consuming a menu labeled with the isotope, then normalized to a ferritin of 15 nanogram/milliLiter (ng/mL)
Time frame: 2 weeks (wks)
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