Lymphatics in Intestinal Absorption of Vitamin B 12 and Iron. ∗

Abstract

Summary

Transport of radio-iron and radio-B₁₂ from the intestinal wall to the blood was studied in 2 dogs with cannulated thoracic ducts. Most of both substances was directly transferred into the blood without going via the lymph. Since large molecules are generally absorbed via lymph, this indicates that the large B₁₂-intrinsic factor is split in the intestinal wall prior to transfer.