Vitamin C Useless for Preventing or Treating Colds  
7/19/2007 1:31:19 AM

NEW YORK (Reuters Health) - For the average person, popping vitamin C pills is unlikely to ward off the common cold or shorten its length or severity. However, for people exposed to short bouts of extreme physical exercise or cold temperatures, vitamin C may markedly reduce their risk of catching a cold. The findings stem from a review of 30 published studies involving 11,350 people who took at least 200 milligrams of vitamin C each day.