Human is Herbivore
Debunking Omnivore and Proving Herbivore Theory
B12 is produced by bacteria in the ground. Our ancestors ate
dirty, fruits, veggies and water loaded with B12. But modern
society sanitizes everything and as a result the bacteria are
destroyed. So vegans should take supplements and I do. You
can buy B12 pills in 99Cent stores. For Vegans (& non-vegans too) a good source of B12 is delicious Nutritional Yeast. 1 tablespoon contains more than double the amount of recommended daily allowance for adults.
3.5 minutes Video
regarding B12.
Dr. John McDougall Medical Message: Vitamin B12