I love it when people pass information on to others, esp doctors.

Since they won't learn this for themselves, I guess the patients have to teach them?

There was an episode on the Discovery Show Mystery Diagnosis, about a poor woman who had terrible symptoms for 10 yrs, including poor balance, vision changes, panic attacks, etc, which totally changed her personality. (they didn't go into "psychotic" but it could be possible I think). She saw a show with a rheumatologist on it, and in desperation went to her, and was quickly diagonosed with B12 deficiency. (her level was around 200). None of the many doctors she consulted for TEN YEARS found this cause!

You will probably need B12 for life. Don't be tempted to stop it when your levels get better-- some people do and as a result they relapse.

I'm glad you are feeling positive now, and I hope you continue to spread the word and improve!