title: How strong is the evidence that nutritional supplements slow the progression of retinitis pigmentosa?
authors.forename: Robert W
authors.initials: RW
authors.lastname: Massof
authors.forename: Gerald A
authors.initials: GA
authors.lastname: Fishman
mesh_terms: D002986:Clinical Trials as Topic; D019587:Dietary Supplements; D018450:Disease Progression; D004359:Drug Therapy, Combination; D006801:Humans; D014975:Lutein / Q000008:administration & dosage*; D012174:Retinitis Pigmentosa / Q000188:drug therapy* / Q000503:physiopathology; D014786:Vision Disorders / Q000188:drug therapy* / Q000503:physiopathology; D014792:Visual Acuity / Q000502:physiology; D014794:Visual Fields / Q000502:physiology; D014801:Vitamin A / Q000008:administration & dosage*
chemical_list: D014801:Vitamin A; D014975:Lutein