Frontiers Efficacy of sublingual and oral vitamin B12 versus intramuscular administration: insights from a systematic review and meta analysis Is the bright red color of B12 injections natural? Lets do my first B12 injection together This is something Ive been nervous about for a long time, but today I finally did itand it honestly wasnt bad at all. I used the Union Medico needle guide B12 Injection benefits! Methylcobalamin, also known as Vitamin B12, is essential for the health of the brain, nerves, and red blood cells. Additionally, it improves mood regulation and increases metabolic energy Vitamin B12 Linus Pauling Institute Oregon State University