Iron absorption from bread in humans: inhibiting effects of cereal fiber, phytate and inositol phosphates with different numbers of phosphate groups.

@article{Brune1992IronAF,
  title={Iron absorption from bread in humans: inhibiting effects of cereal fiber, phytate and inositol phosphates with different numbers of phosphate groups.},
  author={Mats Brune and L Rossander-Hult{\'e}n and Leif Hallberg and Ann Gleerup and Ann-Sofie Sandberg},
  journal={The Journal of nutrition},
  year={1992},
  volume={122 3},
  pages={
          442-9
        }
}
Iron absorption was measured from five kinds of bread made from various types of flour and fermented in different ways in order to obtain a wide variation in the content of fiber, phytate (inositol hexaphosphate) and its degradation products, inorganic phosphate and inositol phosphates with fewer numbers of phosphate groups (inositol pentaphosphate through monophosphate). Each experiment had 9-10 subjects and, in each subject, iron absorption was measured from control rolls made from low… 
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References

SHOWING 1-10 OF 33 REFERENCES
Iron absorption in man: ascorbic acid and dose-dependent inhibition by phytate.
TLDR
The marked inhibition of Fe absorption by phytates and the significant counteracting effect of ascorbic acid have wide nutritional implications.
The inhibitory effect of bran on iron absorption in man.
TLDR
The effects of whole wheat bran and its components on the absorption of nonheme dietary iron were measured using a double isotope technique in human volunteers and inhibition was not explained by monoferric phytate, the major form of iron in bran.
Phytate Hydrolysis by Phytase in Cereals; Effects on In Vitro Estimation of Iron Availability
Phytate (inositol hexaphosphate) hydrolysis by endogenous and exogenous phytases was studied for their effect on increasing iron availability in cereals. Wheat bran and whole meal flours of rye and
Factors affecting the absorption of iron from cereals.
TLDR
Non-haem-iron absorption from a variety of cereal and fibre meals was measured in parous Indian women, using the erythrocyte utilization of radioactive Fe method to establish whether alteration of the phytate and polyphenol contents of sorghum affected Fe absorption from Sorghum meals, and to assess the influence of fibre on Fe absorption.
Improvement of iron nutrition in developing countries: comparison of adding meat, soy protein, ascorbic acid, citric acid, and ferrous sulphate on iron absorption from a simple Latin American-type of meal.
TLDR
It is concluded that several methods are available for increasing iron absorption from a Latin American meal and that the choice of method depends on several factors, particularly cost.
Calcium: effect of different amounts on nonheme- and heme-iron absorption in humans.
TLDR
Addition of calcium chloride to wheat rolls significantly reduced iron absorption, suggesting that the effect of calcium is related to the mucosal transfer of iron.
Phytates and the inhibitory effect of bran on iron absorption in man.
TLDR
Although there appear to be other factors in bran that partly explain the inhibition, phytates are the main cause of the inhibitory effect of bran on iron absorption.
Bioavailability to rats of iron and zinc in wheat bran: response to low-phytate bran and effect of the phytate/zinc molar ratio.
TLDR
Gel filtration chromatography of extracts of raw and low-phytate brans suggested that zinc might be associated with phytate in wheat bran.
Isolation of monoferric phytate from wheat bran and its biological value as an iron source to the rat.
TLDR
It is concluded that the major portion of the iron in wheat is monoferric phytate and has a high biological availability to the rat.
Iron absorption and phenolic compounds: importance of different phenolic structures.
TLDR
The content of iron-binding galloyl groups might be a major determinant of the inhibitory effect of phenolic compounds on iron absorption from the diet, whereas the phenolic catechol groups seem to be of minor importance.
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