Vitamin B12 is a water soluble vitamin that is part of the 8 essential vitamin B family. It plays an important role in maintaining healthy nerve cells as one of its top functions. It is essential in keeping your body running in top condition and is found naturally when we eat a healthy diet. However a stressful lifestyle or poor dietary habits can lead to deficiency of Vitamin B12. This deficiency can lead to serious negative effects on our bodies. A Vitamin B12 injection can help restore energy, help mitigate the negative effects of high stress levels, and help with weight loss.