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

When your body doesn't receive enough vitamin B12, it slows the growth of red blood cells. A cumulative loss of red blood cells can result in vitamin B12 deficiency anemia. With it, you can experience ...

One review recommended that those with vitamin B12 deficiency take 1 mg of vitamin B12 daily for a month, followed by a maintenance dose of 125–250 mcg per day (21 Trusted Source).

Recommended Daily Intake of Vitamin B12. ... These doses seem significantly higher than the RDA of vitamin B12, but your body absorbs only a small percentage of them. Other Considerations.

Most supplements contain way more than the daily recommended value of vitamin b12 (which is just 2.5 mcg), meaning you don't necessarily need to take the supplement every day.

If a person does not get enough vitamin B12, a doctor may suggest supplements containing more than the daily recommended dose. The body does not store excess vitamin B12, so taking extra is not ...

The absorption of vitamin B12 is about 2% at doses of 500 mcg or 1.3% at a dose of 1,000 mcg. Therefore, if someone consumes vitamin B12 less frequently, they will need a higher total amount to ...

Participants assigned either B6 or B12 took 50 times the recommended daily dose. The recommended daily dose for vitamin B6 for both men and women between the ages of 19 and 50 is 1.6 milligrams.