I agree, but I don't understand how this contradicts my comment. People who insist that 'veganism is unnatural because you should supplement B12' never did the slightest research.

• B12 is mostly produced by bacteria, mostly living on and around the roots of trees and smaller plants.
• It is naturally contained in animal products if the animals are free roaming in the nature and eating these roots and the dirt with the bacteria and B12 that sticks to these roots.
• Animals in the food industry mostly do not have the opportunity to eat wild plants and roots and thus would have a B12 deficiency just like vegan humans.
• To address this issue the livestock is fed with B12 supplements.
• Only because of these supplements, industrial animal products contain significant levels of B12.
• So omnivores add the supplements to their food just like vegans do. It's just as 'unnatural'.
• Furthermore, also many omnivores have a B12 deficiency and would benefit from supplementation.

There's absolutely no issue to supplement nutrients as long as it's a reasonable dose corresponding to your needs.