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  2. 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.

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

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

    Deficiency isn't common, but can produce some scary side effects when it does happen. Lack of vitamin B12 can cause megaloblastic anemia —a condition characterized by larger than normal red ...

  4. Vitamin B12 for Weight Loss: Does It Work? - AOL

    www.aol.com/vitamin-b12-weight-loss-does...

    Vitamin B12, also known as cobalamin, isn’t just a popular supplement marketed to help people lose weight— it’s an essential water-soluble vitamin necessary for brain function, heart health ...

  5. 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]

  6. Cyanocobalamin - Wikipedia

    en.wikipedia.org/wiki/Cyanocobalamin

    Cyanocobalamin is a form of vitamin B. 12 used to treat and prevent vitamin B. 12 deficiency except in the presence of cyanide toxicity. [7][8][2] The deficiency may occur in pernicious anemia, following surgical removal of the stomach, with fish tapeworm, or due to bowel cancer.

  7. Methylcobalamin - Wikipedia

    en.wikipedia.org/wiki/Methylcobalamin

    Methylcobalamin (mecobalamin, MeCbl, or MeB 12) is a cobalamin, a form of vitamin B 12. It differs from cyanocobalamin in that the cyano group at the cobalt is replaced with a methyl group. [1] Methylcobalamin features an octahedral cobalt (III) centre and can be obtained as bright red crystals. [2] From the perspective of coordination ...