Vitamin B12 is a vitamin, therefore, we all have to take it (in food or supplements) in order to function properly. There's no cobalt-free vitamin B12. We need very little vitamin B12, micrograms a day. They might be just advising against taking megadoses of it or against using cosmetics containing it (such as Creme de la Mer).
Thank you! That's what I was suspecting but my brain started shutting down and I panicked.