Dear I.F.: The DV (a replacement for what we used to call the recommended daily allowance, or RDA) for vitamin B12 is 2.4 mcg ...

The DV (a replacement for what we used to call the recommended daily allowance, or RDA) for vitamin B12 is 2.4 mcg. (There ...

ANSWER: The DV (a replacement for what we used to call the recommended daily allowance, or RDA) for vitamin B12 is 2.4 mcg.

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. My multivitamin has 100 mcg, which is 4,167% of ...

Further, notes the NIH, some come in doses much higher than recommended amounts, such as 500 mcg or 1,000 mcg, but because your body absorbs only a small percentage, those doses are considered safe.

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 ...

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 ...

Turns out, I am “normal.” 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).