The Brian Lehrer Show Published by The Brian Lehrer Show Vitamin Deficiency? Listen 18 min Queue Download this audio Want to embed this player? Use the code below. More info. <iframe frameborder="0" scrolling="no" height="130" width="100%" src="https://www.wnyc.org/widgets/ondemand_player/wnyc/#file=/audio/json/29777/&share=1"></iframe> Share on Facebook Share on Twitter Email a Friend Tara Parker-Pope, New York Times columnist for the Well column and blog, reviews studies questioning the effectiveness of "mega-doses" of vitamins in promoting health.