Vitamin B12 (Cyanocobalamin), New RDA* 2.5 µg
Vitamin B12 is a water-soluble vitamin. If you eat meat, fish or dairy foods then you should be able to get enough vitamin B12 from your diet.
However, because vitamin B12 isn't found in vegetable foods (such as fruit, vegetables and grains), vegans might not get enough of this vitamin and become deficient.
Vitamin B12 originates from bacteria, fungi and algae, and is present in virtually all animal tissues. Plants contain no vitamin B12 beyond that derived from microbial contamination
*Sourced from EFSA WEBSITE