Mineral utilisation by animals depends primarily on the
minerals’ absorption from ingested feed, with the term
“bioavailability” generally being used to describe both
the absorption and the ultimate metabolic utilisation of
nutrients. Dr Richard Murphy at Alltech’s European
Bioscience Centre writes on how, in the last decade, the
feed industry has experienced a fine-tuning in diet
formulation, not only to match the animal’s nutritional
needs, but also to minimise pollution due to mineral

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