Phytateizinc molar ratio

The relative vulnerability of the secreted zinc to phytate complexatlon has only recently been demonstrated. The injection p zinc deficient rats intraperitoneally with a tracer dose of zlnc allows a portion of this zinc to be in equilibrium with the endogenous metabolic pool. This zinc then is secreted thru the saliva, pancreatic fluid, and bile. Those animals maintained on the phytate containing soy protein contained 2-4 times the radioactivity of the animals fed a casein protein diet (Table II). Therefore, not only does phytate affect the bioavailability of dietary zinc but also the reabsorption of endogenous zinc and thus has a net effect on zinc homeostasis. Since this total phytate effect cannot be measured ly labeling only the dietary pool, the expression of the net effect as the phytateizinc molar ratio is the most sensitive and accurate method of estimating the relative risk of zinc deficiency in any individual or population. 

Cereai Zn conoentration mg/kg dry weight % Phytate PhytateiZinc molar ratio... 

Table 2 The content of zinc and phytate, and the phytateizinc molar ratio In uncooked foods...

Population (millions) Zinc (mg/caput/day) Phytateizinc molar ratio Zinc from animal source foods (%) Estimated population at risk of inadequate zinc intake (%)... 

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See also in sourсe #XX -- [ , , ]

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