does medicare cover home health for vitamin b12 injections Shots at Home: How, Where & How Often to Inject Yourself Does Medicare Cover B12 Shots?
Description
Additional injections of 100 mcg monthly may be needed depending on level of symptom improvement and cause of vitamin B12 deficiency

Intrinsic factor is a protein which is vital in the absorption of B12
Characterization and bioavailability of vitamin B12-compounds from edible algae

doi: 10.1016/j.pharmthera.2009.06.005
