The issue of B-12 deficiency is of great concern for myself and others in the community. After switching to a vegan diet, I looked for alternative sources of cobalamin. Currently, I buy nutritional yeast in bulk from various stores, sometimes take a supplement, and eat other fortified foods. A claim I read online states that rejuvelac contains B-12. Rejuvelac is a fermented drink, popularized by Ann Wigmore. It is created by soaking wheat berries in water and straining the liquid once it becomes milky. I have used it in vegan cheese recipes, specifically one created by Miyoko Schinner in The Homemade Vegan Pantry.
I have found little supporting evidence while searching for an answer as to whether rejuvelac contains sufficient levels of B-12 for a vegan or vegetarian.
From additional research, cobalamin levels in foods are related to the level of cobalt in the soil that the crop of interest grew and how reactive bacteria were; B12 is only created by bacteria as a by-product of a reaction. According to this source, cobalamin created by fermentation is called pseudo-cobalamin and "competes with other forms of B-12".
How is B-12 created industrially? Can psuedo-cobalamin be converted into other forms? What is a reliable source for cobalamin rich plants?