Keith, that is the most detailed post I have seen on B12 I have seen. I usefully just point people to a few links explaining why supplementing with shitty B12 is not smart for anyone taking the high road when talking about vegan or vegetarian diets. I've tried to explain this before to no avail. You have given me some great links. I've always tried to use this argument to prove that began lifestyles are not the way someone conscious of health should eat. If it's an animal cruelty issue I don't see why you can't support ethical butchers and organic farmers for the sake of great health.