Vitamin B12

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Vitamin B12

Vitamin B12 is cobalamin, and cyanocobalamin is a man-made form thereof.[1] It's biological half-life is ~6 days (400 days in the liver)[2]

The active form of Vitamin B12 is methylcobalamin, or "methyl B12". [Source needed]

Methylcobalamin has the following advantages:[3]

  • It is the natural form of cobalamin
  • Does not require conversion, within the body, to the methyl form
  • Does not produce cyanide within the body



Storage

  • Methylcobalamin is light sensitive[4]
  • Methylcobalamin may be temperature sensitive[5]

References

  1. ↑ Cyanocobalamin,WebMD,http://www.webmd.com/drugs/2/drug-1010/cyanocobalamin-vitamin-b-12-oral/details
  2. ↑ Vitam B12,Google,https://www.google.com/search?q=vitamin+b12
  3. ↑ Oral B12 Supplements,Paul Golding,http://www.paulgolding.id.au/B12_AND_FOLATE/Pages/B12AndFolateInformation/B12Notes/Treatment/OralB12Supplements.html
  4. ↑ Methylcobalamin,Wikipedia,https://en.wikipedia.org/wiki/Methylcobalamin#/media/File:B12_methylcobalamin.jpg
  5. ↑ Methylcobalamin,Wikipedia,https://en.wikipedia.org/wiki/Methylcobalamin#/media/File:B12_methylcobalamin.jpg
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