The card does not speak about vegetarians and vegans. It notes that vitamin B12 is found in food of animal origin and is linked to the metabolism of proteins, fats and carbohydrates; it also takes part in cell metabolism and is important for DNA replication, the work of the nervous system and red blood cells. The card gives no recommendations for these groups.
General information (not a manufacturer's instruction): whether a supplement is needed on a plant-based diet and in what dose is decided by a doctor, if necessary based on tests.