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  • Title: Phytate content of foods: effect on dietary zinc bioavailability.
    Author: Oberleas D, Harland BF.
    Journal: J Am Diet Assoc; 1981 Oct; 79(4):433-6. PubMed ID: 7288050.
    Abstract:
    The phytate content of several foods is presented. Published zinc values were used to calculate phytate:zinc molar ratios. These ratios can be used to estimate the relative risk of having an inadequate intake of zinc. They may be used in planning menus to select the combination of foods that will supply the most available zinc to the daily diet. On the basis of animal experiments to date, a daily phytate:zinc molar ratio of 10 or less is thought to be acceptable in providing adequate dietary zinc, and daily ratios consistently above 20 may jeopardize zinc status. Many factors other than the daily dietary phytate:zinc molar ratio influence zinc nutriture, but the ratio concept is a tool which may contribute to a more accurate assessment of zinc status.
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