[accessed March 22, 2012]. The best sources of Vitamin B 12 include: eggs, milk, cheese, milk products, meat, fish, shellfish and poultry. Some soy and rice beverages as well as soy based meat substitutes are fortified with vitamin B12.To see if a product contains vitamin B 12 check the Nutrition Facts on the food label.The following table shows you which foods are sources of vitamin B 12.ome soy and rice beverages as well as soy based meat substitutes are fortified with vitamin B12. To see if a product contains vitamin B 12 check the Nutrition Facts on the food label. The following table shows you which foods are sources of vitamin B 12.