title: Retinol equivalency ratio of beta-carotene.
authors.forename: Robert M
authors.initials: RM
authors.lastname: Russell
authors.forename: A Catharine
authors.initials: AC
authors.lastname: Ross
authors.forename: Paula R
authors.initials: PR
authors.lastname: Trumbo
authors.forename: Keith P
authors.initials: KP
authors.lastname: West
mesh_terms: D006801:Humans; D013810:Therapeutic Equivalency; D014801:Vitamin A / Q000008:administration & dosage / Q000493:pharmacokinetics*; D014802:Vitamin A Deficiency / Q000188:drug therapy* / Q000378:metabolism; D019207:beta Carotene / Q000008:administration & dosage / Q000493:pharmacokinetics*
chemical_list: D019207:beta Carotene; D014801:Vitamin A