title: Commentary: Ultraviolet irradiation and oral ingestion as sources of optimal vitamin D.
authors.affiliation: Dermatoepidemiology Unit, Department of Veterans Affairs Medical Center, Providence, Rhode Island 02908, USA.
authors.forename: William G
authors.initials: WG
authors.lastname: Tsiaras
authors.forename: Martin A
authors.initials: MA
authors.lastname: Weinstock
mesh_terms: D000284:Administration, Oral; D019587:Dietary Supplements; D005431:Florida; D006801:Humans; D012621:Seasons; D013472:Sunlight / Q000009:adverse effects; D014466:Ultraviolet Rays; D014807:Vitamin D / Q000008:administration & dosage* / Q000031:analogs & derivatives / Q000096:biosynthesis* / Q000097:blood
chemical_list: D014807:Vitamin D; C104450:25-hydroxyvitamin D