Some algae are potentially adequate sources of vitamin B-12 for vegans.
Davis
D R
DR
D002648:Child; D002708:Chlorella / Q000737:chemistry; D014676:Diet, Vegetarian; D006801:Humans; D012624:Seaweed / Q000737:chemistry; D014805:Vitamin B 12 / Q000032:analysis / Q000097:blood*
D014805:Vitamin B 12