My mom's number was in the 400s and she had paresthesias that went away with methylcobalamin treatment. You really need to go by what the number was plus any symptoms.

Find a good vitamin D supplement. Recent studies suggest a direct correlation between low vitamin D and autoimmune diseases. 5000 IUs per day at least. Talk to your doctor!

As far as vitamin B12 supplements, a methylcobalamin tablet would be best (instead of cyanocobalamin). FYI

Annie