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How much zinc is in Multigrain Cheerios? 

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ZnO appears an advantageous alternative to soluble zinc salts such as zinc gluconate.
Thus, zinc balance, concentrations of zinc in plasma and bone, esophageal histology and retention of 65Zn indicate that the minimum zinc requirement of the neonatal pig is between 26 and 31 ppm when fed a purified diet devoid of phytate.
This process is probably independent of the zinc concentration.
These results demonstrate (i) that dietary zinc was used more efficiently by broilers than by piglets, most probably due to the lower gizzard pH and its related higher zinc solubility; (ii) that zinc supplementation, irrespective of zinc source, was successful in improving animal's zinc status; and (iii) suggest that supplemented Zn availability was independent from the diet formulation.
Under the usual conditions the diet should have supplied adequate zinc, but it seemed worthwhile to test the value of supplemental zinc in view of the occurrence of a zinc dificiency in swine when a high level of calcium is added to practical rations.
In conclusion, the present experiment showed that zinc sulphate and zinc gluconate are equally efficient as zinc supplements in salmon feeds within the concentrations normally found in salmon feed.