A comparison of the vitamin B12and cobalt contents of livers from normal lambs, cobalt-dosed lambs, and others with a recent history of mild cobalt deficiency disease

摘要

Vitamin B12and cobalt concentrations were determined in the livers of 3 groups of lambs. One group, not given supplementary cobalt, was grazed on cobalt-sufficient pasture. A second group was dosed at the rate of 7 mg Co a lamb a week and grazed on pasture that had remained generally low in cobalt until about 2 months before the end of the trial. The third group was given no supplementary cobalt, grazed the same pasture as the second group and showed evidence of mild cobalt deficiency disease followed by a recovery within the last 2 mon ths of the trial.