Is Vitamin B12 (Cyanocobalamin) vegan?

Vegan

B12 in supplements is bacterial fermentation. Always vegan.

Also known as: cobalamin, methylcobalamin

What it is

A vitamin produced by bacteria (Propionibacterium freudenreichii).

Why vegan

Industrial B12 is microbial, not animal-derived. Animals only contain B12 because they too eat it or harbor producing bacteria.

Where you'll find it

  • Multivitamins
  • Fortified plant milks
  • Nutritional yeast

Vegan alternatives

  • N/A — vegan by default in supplements

FAQ

Do vegans need to supplement B12?
Yes — it is the one nutrient that cannot reliably come from a plant diet without fortified foods or supplements.

Sources

Last reviewed June 4, 2026

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