title: A friend of mine uses a bioavailable vitamin product that's supposed to be better absorbed by the body than is a normal vitamin. Are they worth the extra expense?
mesh_terms: D000042:Absorption; D001682:Biological Availability; D017277:Drug Approval; D006801:Humans; D014815:Vitamins / Q000493:pharmacokinetics*
chemical_list: D014815:Vitamins