Hi. I'm Meg. Recently had blood tests done and was told that I was "borderline" deficient in B12.
Results were:
Homocysteine 9.9 (range <10.4)
serum B12 282 (200-1100)
methylmalonic acid 319 (range 87-318)
Was told to take 500 mcg B12 daily. That was all. No mention of injections.
I have been treated for autoimmune thyroid disease for a while now. Thought my lingering fatigue, depression, achy muscles, tingly hands etc. were a periodic manifestation of residual thyroid symptoms, but since my thyroid was being treated and my levels were consistently normal, I resigned to thinking there's not much else I can do. Perhaps it was thyroid hormone levels fluctuating throughout the day and I would just have to endure it. Also, I noticed I was looking pale most mornings and decided to take iron supplements. They seem to work okay and my iron levels on blood tests started looking better (though never flagged as low).
I should say, I'm in the US and have a fairly open-minded endocrinologist in New York City, but I am thinking he has missed this for several years and only when this blip occurred recently, he decided to tell me to take a vitamin. This site and a good book taught me that not all B12 supplements are alike and I've now decided to take the sub-lingual methylcobalamin form of the vitamin at not 500 but 5000 mcgs.
Amazingly, I began feeling better after a few weeks. Still not sure if what I have is PA (though I have one autoimmune issue already and am told they are likely to go hand in hand).
Any advice or insight would be much appreciated.
Meg