You can cover one important possibility by getting at least 1000 mcg oral B12 per day (not timed release).

Please read my non-commercial website. It won't take you long, and it is very important information. If malabsorption or some other cause of B12 deficiency is the problem, damage will continue until you get store building back up. And most docs do not know how to diagnose it or to even begin ruling it out.

rose