Now I am doing a more serious reseach and oooops, it is damn serious!
My friend Sassy writes in her website:
"It's very important for you to grasp that in our modern food supply B12 is found MOSTLY in animal products. Why? Because Vitamin B12 comes from our soil. When a cow, for instance, chomps on grass she eats this vitamin B12-enriched soil. There are also microorganisms located in the animal's intestine that produce Vitamin B12.
And those ancestors of ours who were able to thrive on a plant-based diet without adding any Vegan Vitamin B12 supplements? Well, they were getting their food directly out of the ground still covered in soil -- soil which they were never quite able to completely remove. Our food today is usually very clean by the time it makes it to our stores, and then we further clean it in our own kitchen (since most of us don't like the taste of dirt). Goodbye Vitamin B12.
If you eat a vegan diet, you MUST be sure you're getting the amount of Vegan Vitamin B12 you need."
Ok, now I am taking b-12 pills and will get some more nutritional yeast for home.