Bioactive B12 is a potent and bioavailable blend, containing both of the most active forms of B12: Dual Coenzyme Methylcobalamin and Adenosylcobalamin. With NO artificial preservatives and colourings - and held only in pure reverse osmosis water. B12 is essential in many vital functions in the body so when choosing which form of B12, it is important to ensure you are taking the most active, bioavailable forms. Dual Coenzyme Vitamin B12 3000mcg METHYLCOBALAMIN and ADENOSYLCOBALAMIN for maximum bioavailability Vitamin B12 in Liquid Form for increased absorption - bipasses stomach and liver ENERGY - Supports immune function, metabolism, mood and concentration, reduces tiredness and fatigue No Artificial Colourings or Flavourings - In only Pure Distilled Water Manufactured in the UK in violet glass for maximum UV protection to prolong the life of your Vit B12