If your neurologist or oncologist was worried about pernicious anemia, they would recommend oral doses of 1,000-2,000 mcg daily, or they would prescribe B12 injections.

The 2.4 mcg of B12 that is fine for most people is totally inadequate when it comes to pernicious anemia. Low vitamin B12 can have neurological and psychiatric manifestations.

The 2.4 mcg of B12 that is fine for most people is totally inadequate when it comes to pernicious anemia. Low vitamin B12 can have neurological and psychiatric manifestations.

However, the neurologist told me to take 2,000 mcg of B12 daily. My multivitamin has 100 mcg, which is 4,167% of the daily value (DV). As I understand the recommended DV is 2.4 mcg, and for those over ...

DEAR DR. ROACH: I am 73, and I was worried about dementia. Turns out, I am “normal.” However, the neurologist told me to take 2,000 mcg of B12 daily.

If your neurologist or oncologist was worried about pernicious anemia, they would recommend oral doses of 1,000-2,000 mcg daily, or they would prescribe B12 injections. If you don’t have pernicious ...

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