b12 injection once a week Vitamin Injections: Who, What, Where, When — Dr. Heather Friedman ND, LAc Vitamin B12 Injections: Boost Energy

Prescription Requirements and Medical Supervision Vitamin B12 injections need a prescription and careful medical watch

Mood Enhancement: B12 plays a key role in producing mood-regulating chemicals in the brain, which can help alleviate feelings of stress or depression

We avoid the use of cyanocobalamin which is an old form, which holistic doctors don't rely upon, you don't get as good of metabolic effects from it

But only a maximum of 5mcg of B12 enters the bile every day (according to "Advanced Haematology" 7th edition textbook, page 60), so it seems that only an additional 5mcg would be lost daily if none was recovered