The Brian Lehrer Show Edit this 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.