I was diagnosed with a b12 deficiency 5 years ago had a level in the low 200 and neuro symptoms. i was given one shot and 30 days of pills and i still have a lot of symptoms.i was retested in the 500's. what should i do?

Normal: Now your B12 levels are within normal range.

Still low: Hopefully your evaluation included exploring why you are B12 deficient as several things can cause it. For a low level it can take several shots at first or a daily dose of a high amount of B12 to get normal levels. I would work hard to do so in the setting of neuro deficits. We have learned that a high enough oral dose may be enough and shots may not be needed. Would take to your physician.

Your symptoms: What type of symptoms are your having that have not resolved? Some folks have an issue with methylation and are not able to convert B12 to active B12 instead of cyanob12 or hydroxyb12 they need methyl b12. A test for mthfr gene can be done to determine if you have this issue.