Natural beverages do not naturally contain massive concentrations of vitamin B12 unless they have been fortified through industrial processing. Plant-based milks (such as soy, almond, or oat milk), energy drinks, and certain nutritional malt beverages that are commercially fortified with cyanocobalamin represent the highest dietary sources of B12 among liquids. For natural, unfortified options, animal-based beverages like cow's milk and dairy kefir contain moderate amounts, whereas plant milks are specifically spiked to assist vegan diets.