B12-ND is a rich, live source of vitamin B12 in the preferred probiotic-cultured forms. Vitamin B12 supports nervous system health and the formation of blood, fatty acids and nucleic acids. This advanced formula provides premier B12 support, especially for vegetarians and vegans (derived via probiotic fermentation, not animal sources). ND Technology (Nanized Delivery) Our premier formula is micro-digested into extremely small, bioavailable particles using our proprietary fermentation process via multi-strain probiotic colonies to allow rapid cellular delivery and 4-polarity dynamics, unlike any other product. Many people say they can feel the effect of this product the very first time they take it. This formula is preserved with certified organic alcohol (pesticide and heavy metal residues not detected via lab testing).