Postprandial Plasma Zinc Changes in Pigs

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Abstract
In growing male pigs fitted with jugular catheters, changes in plasma Zn concentrations were followed up to 330 min postprandially. In pigs with normal fasting Zn values (> 70 .mu.g/100 ml), plasma levels decreased significantly (P < 0.05) up to 35% below; in pigs with lowered fasting values, plasma level increased up to 36% above the respective fasting values, within 120 and 180 min after feed intake. The amount of feed administered was without effect on the postprandial decline. No dose-response relationship between the intake of graded amounts of Zn in the inorganic (ZnSO4) or naturally bound form (barley) and changes in plasma Zn level was found.