how is vitamin b12 injection made Injections: Who Should Get Them and Long Do They Last? B12 Shots at Home: How,
Description
Some medical conditions, including celiac disease and Crohns disease, can also impact the way the body absorbs B12

For vitamin B12 to be absorbed from the gut, it must bind to a protein called intrinsic factor, which limits how much B12 the gut can take in at one time
Oral medications
So you will see other markers such as a low red blood cell count, low hemoglobin, low hematocrit, and elevated MCV, MCHC, MCH, and RDW

Methylcobalamin is compounded and is not an FDA-approved drug

Animal studies
