Vitamin B12 in the blood and in the liver of normal and of totally gastrectomized pigs.

The concentration of vitamin R in the blood was studied in five totally gastrectomized pigs followed for 10–18 months, and in four controls followed for 5¼–8 months. The concentration of vitamin B12 in the liver was investigated in three pigs of each group. The content of vitamin B in the blood was of the same magnitude in both groups. Thus, removal of the stomach does not compromise the normal presence of this vitamin in the blood. The B content in the liver was also unaffected by the operation, whereas it was increased after simultaneous administration of vitamin B.