Even psychosis can be caused by B12 deficiency. People are affected differently and at different rates, so a symptom or sign that may not occur in many at all or until very late can occur early in some.

It is amazing.

I know that if anyone I love has any symptoms, especially neuro or neuropsychiatric, I want them to take B12 in the best form possible. It is safe and inexpensive, so there's no reason to take a chance.

rose