A vitamin B12 Deficiency is NO JOKE! ❌ Your body does not make vitamin B12 on its own, so you have to consume food and drinks that have vitamin B12 in order to get it. Vitamin B12 is found in animal products you eat and drink such as meat, dairy and eggs. It can also be found in fortified foods (foods that have certain vitamins and nutrients added to them) such as certain cereals and bread! There are 2 things that need to happen in order for your body to absorb vitamin B12 from the food you eat.