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Table 3 Ferritin concentrations in Caco 2 cells exposed to samples of beans only (whole bean, 49 ppm Fe and 71 ppm Fe, "Low Fe" and "High Fe" beans, respectively) and bean-based diets digests; "Low Fe" bean diet (42 ppm Fe) and "High Fe" bean diet (54 ppm Fe).

From: Biofortified red mottled beans (Phaseolus vulgaris L.) in a maize and bean diet provide more bioavailable iron than standard red mottled beans: Studies in poultry (Gallus gallus) and an in vitro digestion/Caco-2 model

Tested sample1 Ferritin (ng/mg of protein)
"Low Fe" bean only 7.82 ± 0.75d
"High Fe" bean only 30.6 ± 2.08a
"Low Fe" bean-based diet 11.2 ± 0.97c
"High Fe" bean-based diet 15.7 ± 1.05b
Baseline2 4.06 ± 0.37e
  1. 1Caco 2 bioassay procedures and preparation of the digested samples are described in the materials and methods sections.
  2. 2Cells were exposed to only MEM growth media without added food digests and Fe. Values are means ± SEM, n = 6. Means with no letters in common are significantly different, P < 0.05.