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Iron bioavailability from manually dissected maize samples as measured via Caco-2 cell bioassay (cell ferritin formation equals Fe uptake). Numbers on top of the bar values represent Fe concentrations (µg/g) of samples. Bar values within variety with no letter in common are significantly different (p < 0.05). Bar values are mean ± SD, n = 3. Dashed red line indicates Caco-2 cell baseline ferritin level when exposed only to the in vitro digest solutions without food samples.
