Grain-based materials fermented with Propionibacterium freudenreichii have enough vitamin B12 to be nutritionally significant. With the help of Lactobacillus brevis in the fermentation process, vegans can also be guaranteed a sufficient and safe B12 intake directly from grain-based food, without pills.
Click here for original story, An easier way to go veggie: Vitamin B12 can be produced during dough fermentation
Source: ScienceDaily