Vitamin B12 is a water-soluble vitamin that contains the mineral cobalt and hence also referred to as Cobalamin.
Vitamin b12 is readily available in foods of animal origin but not available in plant-based foods. However, fortified breakfast cereals and fortified nutritional yeasts are good sources of vitamin B12 that have high bioavailability .
Also, vitamin B12 has the largest and most complex chemical structure of all the vitamins.
Toxicity is rare for this nutrient as it’s a water-soluble vitamin and the body removes excess amount instantly [1,2,4].