Nutrigold Vitamin B12 Sublingual x 60 TabletsThis Nutrigold Vitamin B12 product contains two special forms of bioactive B12; methylcobalamin and adenosylcobalamin. Both of these forms of Vitamin B12 work synergistically, playing vital roles in energy production, healthy blood cell formation, as well as in the central nervous system. Vitamin B12 is naturally found in fish, dairy produce, organ meats, beef, and pork. This means that vegetarians and vegans often choose it as a regular supplement.