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I would suggest making sure all his nutritional elements are optimal. Even a low normal b12 serum level can cause hematological problems. A serum b12 needs to be at 500. The ranges used by many labs are out of date and anything below 500 should raise a flag. So find out exactly what the lab result was. It's a good idea to get and keep copies of all labs. You would be amazed at how many things are flagged that the docs don't tell you about.
Do you know the reason for the b12 deficiency? Many times if one has problems with one, there are others that are not optimal.
The other key nutrients, in addition to B12, to check are: Vitamin D, folate, iron, copper and zinc.
Also, look at any med he may be on.
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Marlene, wife to John DX w/SAA April 2002, Stable partial remission; Treated with High Dose Cytoxan, Johns Hopkins, June 2002. Final phlebotomy 11/2016. As of July 2021 HGB 12.0, WBC 4.70/ANC 3.85, Plts 110K.
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