Reference curves to diagnose cobalt deficiency in sheep using liver and serum vitamin B12 levels

Abstract
Reference curves demonstrating the relationship between serum or liver vitamin B12 and weight gain were derived from the examination of 16 published and 48 unpublished N.Z. trials. From these curves probability of obtaining an economic reponse (>10g/day body weight increase) for any serum or liver vitamin B12 can be determined. No significant (P10 g/day) is not likely was 336 pmol/l for serum and 282 nmol/kg for liver.