Liquid B12Description Vitamin B12 is an essential nutrient which contributes to normal functioning of the nervous system and the reduction of tiredness and fatigue. This vegan liquid formulation is made using a natural fermentation process and includes both methyl and adenosylcobalamin. These 2 different forms are at varying stages of metabolism and are required and used for different processes in the body. Formulated in a base of glycerine, (sourced from