title: Do we need to reconsider the desirable blood level of vitamin B12?
authors.forename: A David
authors.initials: AD
authors.lastname: Smith
authors.forename: Helga
authors.initials: H
authors.lastname: Refsum
mesh_terms: D000367:Age Factors; D006710:Homocysteine / Q000378:metabolism; D006801:Humans; D008764:Methylmalonic Acid / Q000378:metabolism; D011379:Prognosis; D014805:Vitamin B 12 / Q000097:blood*; D014806:Vitamin B 12 Deficiency / Q000150:complications / Q000175:diagnosis*
chemical_list: D006710:Homocysteine; D008764:Methylmalonic Acid; D014805:Vitamin B 12