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 Vitamin B12 Injection in Madison, WI Nuovo Te B12 Shots Phoenix Arcadia, Scottsdale, Tempe & Glendale 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