What is the process of iron absorption in the body? I - The majority of iron in the diet is in the ferric form, which has low solubility and bioav...

What is the process of iron absorption in the body?

I - The majority of iron in the diet is in the ferric form, which has low solubility and bioavailability.
II - During digestion, non-heme iron is complexed with various digestion products that can facilitate or hinder its absorption.
III - The absorption of iron occurs in the upper duodenal epithelium, which has villous structures that increase the absorption surface.
IV - The main protein involved in the absorption of iron by enterocytes is the divalent metal transporter 1 (DMT-1).
V - The absorption of heme iron and ferritin is less understood.
VI - The ferroportin, also known as IREG1, is the main iron exporter in the body.
a) I, II, III, IV, V and VI are correct.
b) I, II, III, IV and VI are correct.
c) II, III, IV, V and VI are correct.
d) I, III, IV and VI are correct.