http://www.youtube.com/watch?v=jcBJ96PIbyI here is interesting vid. about fruit b12...(greens, root vegetable, mushrooms,algae(All sources)
Also I did 2x waterfast prolong, always rebalance even B12(heal my intestine), see Dan liferegenerator or other famillies with children, usually not supplementing.
Sure the bacteria in civilisation world is low, but...
Sure cobbalt in soil is low maybe, but still those people exist, no symtoms, only lower level of B12 in blood. And some of them actually told me to have this B12shots finally toxic. (different story for boosting your appetite and trive with it as a pushing athlete)... Thx.