Recommended daily intake= 2.4 mcg

There are no vegan foods contain vitamin B12, only foods fortified with vitamin B12

Deficiency symptoms

  1. megaloblastic anemia
    https://www.ncbi.nlm.nih.gov/pubmed/28925645
  2. Erythematous Oral Macules
    https://www.ncbi.nlm.nih.gov/pubmed/31615625
  3. psychiatric illness
    https://www.ncbi.nlm.nih.gov/pubmed/31617966
  4. severe neurologic sequelae in infants
    https://www.ncbi.nlm.nih.gov/pubmed/31604629
  5. growth retardation, and infertility.
    https://www.ncbi.nlm.nih.gov/pubmed/31546940
  6. Excessive Daytime Sleepiness
    https://www.ncbi.nlm.nih.gov/pubmed/31538608

 

Function:

  1. important for protein metabolism
    https://medlineplus.gov/ency/article/002403.htm
  2. helps in the formation of red blood cells
    https://medlineplus.gov/ency/article/002403.htm
  3. maintenance of the central nervous system.
    https://medlineplus.gov/ency/article/002403.htm
  4. protects cells from oxidative DNA damage
    https://www.sciencedirect.com/science/article/pii/B9780128092521000146
  5. Inflammation reduction
    https://www.sciencedirect.com/science/article/pii/B9780128092521000146
  6. cofactor for several essential enzymatic reactions, including methionine synthesis
    https://www.sciencedirect.com/science/article/pii/B012227055X000171

 

Overdose: 0.4-1 mg but does not have any side effects

Excess: excreted in the urine

Type: water soluble vitamin
https://ods.od.nih.gov/factsheets/VitaminB12-HealthProfessional/#h8