A common dietary source of Vitamin B12 is animal products such as meat, fish, poultry, eggs, and dairy. For vegetarians and vegans, obtaining adequate B12 can be challenging, as plant-based foods do not naturally contain this essential vitamin. Thus, fortified foods like certain cereals and non-dairy milk are essential for those following a non-animal diet. Additionally, vitamin B12 supplements can be taken to ensure sufficient intake. Regular monitoring of B12 levels is advisable for individuals at higher risk of deficiency to maintain optimal health.