Vitamin B12 is a nutrient that plays essential roles in the maintenance of blood and nerve cells and in the production of DNA, our cells’ genetic material. Many people get enough B12 from the animal-based foods they eat, however vegetarians are at risk for B12 deficiency. Additionally, some people lack a protein that helps absorb B12 and often feel anemic, while others who are under stress require greater amounts of B12. Dr. Sue's B12 spray is more potent and better absorbed than B12 in pill or sublingual forms, and provides a great energy boost.