[halostatue]

I'm not vegan, but ovo-lacto vegetarian, so B12 deficiency isn't anything I've ever had to worry about.

With appropriate fortified foods (synthesized bacterial sources adding B12 to nutritional yeast, plant milks, etc.), vegans don't need to worry about it either.

A quick bit of research suggests that as much at 16% of meat eaters have B12 deficiency, so it's a systemic problem.