Persistance of intramuscular deposits of vitamin D3 in slaughter pigs.

In pigs given injections of 1.5 mill IU vitamin D3 in oil intramuscularly 9, 5 or 3 weeks before slaughter residues in the depots were very high (table 1). Certain cuts of pork from pigs treated in this way should therefore be regarded as unacceptably polluted. Furthermore the practise of using oily vitamin D preparations for injection in veterinary medicine appears to be unjustified in modern husbandry.