Many vegans worry about getting enough Vitamin B12 in their diet.
According to Wiki Vitamin B12: ” Neither fungi, plants nor animals are capable of producing vitamin B12. Only bacteria and archaea have the enzymes required for its synthesis, although many foods are a natural source of B12 because of bacterial symbiosis. The vitamin is the largest and most structurally complicated vitamin and can be produced industrially only through bacterial fermentation-synthesis.”
The only true source of B12 is bacteria. Animals who eat food containing this bacteria will get vitamin B12 and in turn pass it to meat eaters. In the past where people lived more in accordance with nature and with less chemicals, B12 was also found in veggies.
Many people including meat eaters are B12 deficient which is due to their intestines’s lack of ability to absorb the vitamin!
One great way that Vegans can add Vitamin B12 to their diet is to use Nutritional Yeast which is obtained from good source of B12. Many pastas, cereals and even milks are fortified with B12.
Still it is to be on the safer side and take a supplement of B12 as well.
Read this wonderful article from Raw Food Explaind to learn more about B12.