concentrated vitamin b12 injection Compounded Cyanocobalamin (Vitamin B12) Vitamin B Feel your best from the
Description
While cyanocobalamin can still raise blood levels, it may not act as quickly or effectively in neurological tissue
B12 Booster Shots

Pissios P, et al
What if the study involves individuals with a history of depression or mood disorders

It also serves as a cofactor for several enzymes involved in the biosynthesis of collagen, carnitine, and neurotransmitters, as well as in the metabolism of tyrosine and peptide hormones