Effects of phytate and minerals on the bioavailability of oxalate from food

Israr, B., Frazier, R. A. ORCID: https://orcid.org/0000-0003-4313-0019 and Gordon, M. H. (2013) Effects of phytate and minerals on the bioavailability of oxalate from food. Food Chemistry, 141 (3). pp. 1690-1693. ISSN 0308-8146 doi: 10.1016/j.foodchem.2013.04.130

Abstract/Summary

Phytate and mineral cations are both considered as important dietary factors for inhibiting the crystallisation of calcium oxalate kidney stones in susceptible individuals. In this paper, the phytate and mineral composition of whole bran cereals (wheat, barley and oat) and legumes were determined together with their soluble and insoluble oxalate concentrations in order to investigate the effects on oxalate solubility. The oat bran sample had the highest soluble oxalate concentration at 79 ± 1.3 mg/100 g, while total and soluble oxalate concentrations in the food samples studied range from 33 to 199 mg/100 g and 14 to 79 mg/100 g, respectively. The phytate concentration was in the range from 227 to 4393 mg/100 g and the concentrations of cations were in the range 54–70 mg/100 g for calcium, 75–398 mg/100 g for magnesium, 244–1529 mg/100 g for potassium and 4–11 mg/100 g for iron. Soluble oxalate concentration did not increase in proportion to total oxalate, and the phytate concentration in all foods was sufficient to contribute to an increase in soluble oxalate concentration by binding calcium.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/32877
Identification Number/DOI	10.1016/j.foodchem.2013.04.130
Refereed	Yes
Divisions	Life Sciences > School of Chemistry, Food and Pharmacy > Department of Food and Nutritional Sciences > Human Nutrition Research Group Life Sciences > School of Chemistry, Food and Pharmacy > Department of Food and Nutritional Sciences > Food Research Group
Uncontrolled Keywords	Bioavailability; Calcium; Minerals; Oxalate and phytate
Publisher	Elsevier
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