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 injections, now available at The Foot Health Practice 01226293693! Vitamin B12 deficiency is a growing problem in the UK, with 10% of people aged 75 and over affected. Vegetarians Vitamin B12 Injection in Luton Boost Energy & Wellbeing Biscot Pharmacy How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust