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2. Vitamin B12 Is a Power Nutrient. Here's How to Know If ... - AOL

   www.aol.com/vitamin-b12-power-nutrient-heres...

   The National Institutes of Health recommends that the average man consume a mere 2.4 micrograms a day, which is actually the lowest daily recommended dose of any vitamin. “Vitamin B12 ...

3. Vitamin B12 - Wikipedia

   en.wikipedia.org/wiki/Vitamin_B12

   Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism. [2] It is one of eight B vitamins. It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism. [3]

4. These High-Quality Vitamin B12 Supplements Can Help ... - AOL

   www.aol.com/lifestyle/high-quality-vitamin-b12...

   Again, the daily recommended dietary allowance of vitamin B12 for most adults is 2.4 micrograms, stretching up to 2.6 and 2.8 micrograms if you’re pregnant or nursing.

5. Vitamin B12 deficiency - Wikipedia

   en.wikipedia.org/wiki/Vitamin_B12_deficiency

   Vitamin B12 deficiency, also known as cobalamin deficiency, is the medical condition in which the blood and tissue have a lower than normal level of vitamin B 12. [ 5 ] Symptoms can vary from none to severe. [ 1 ] Mild deficiency may have few or absent symptoms. [ 1 ]

6. Is It Possible to Take Too Much B12? Here's What ... - AOL

   www.aol.com/lifestyle/possible-too-much-b12-here...

   Registered dietitians explain what vitamin B12 is, how much you need, and the potential side effects of taking too much.

7. Serum vitamin B12 - Wikipedia

   en.wikipedia.org/wiki/Serum_vitamin_B12

   Serum vitamin B12. Serum vitamin B12 is a medical laboratory test that measure vitamin B 12 only in the blood binding to both transcobalamins. [1] Most of the time, 80–94% of vitamin B 12 in the blood binds to haptocorrin, while only 6–20% is binds to transcobalamin ll. [2] Only transcobalamin ll is "active" and can be used by the body. [1]