Negative Effects of Vitamin B 12 on Blood of Healthy Individuals,with Special Reference to Eosinophils. ∗

Abstract

Summary

1. Oral or intramuscular administration of large amounts of vit. B₁₂ was without effect on the blood of healthy adults and children. In particular, an eosinophilia was not observed. 2. Neither allergic nor toxic symptoms were noted during or after therapy. 3. It is concluded that vit. B₁₂ is not the eosinophilic factor present in raw calves liver.