Excretion of Cobalt 60 -Labeled Vitamin B 12 after Total Gastrectomy. ∗

Summary

Co⁶⁰-labeled vit. B₁₂ was administered orally in 0.5 γ doses to 4 patients who had had a total gastrectomy. Each patient excreted in the stools essentially all of the administered radioactivity. When gastric juice was given with the vitamin there was a decrease in Co⁶⁰ excretion to levels similar to those found in control subjects.