Vitamin b12 is an essential vitamin that plays an important role in the synthesis and function of red blood cells and the nervous system. Our bodies do not make vitamin b12, we consume it in our diet. It is mainly present in animal-based products. Those who follow a vegan or a plant-based diet are more likely to be deficient in vitamin b12. We offer a safe and accessible private vitamin b12 injection service in Sunderland at Sunderland.