Seeing Red: Do B12 Injections Work? LAmag NEW TREATMENT ALERT A vitamin B12 injection helps treat or prevent deficiency by delivering the vitamin directly into the bloodstream. It's often used for people with absorption issues and is usually safe Boost Immunity: B12 Injections At Radiant A MedSpa Naperville Vitamin B12 Monthly Injection Dose: Typical Dosages & Administration Methods Liv Hospital Do you know why vitamin B12 is red? Vitamin B12 (Methylcobalamin) is red in color because it contains cobalt (Co), a rare biochemical element, at the center of a porphyrin ring