Linus Pauling thought that vitamin C prevents colds, and cures them too. Thomas Chalmers and associates did a randomized controlled double-blind experiment to find out. 12 The subjects were 311 volunteers at the National Institutes of Health. These subjects were assigned at random to 1 of 4 groups: Group Prevention Therapy 1 placebo placebo 2 vitamin C placebo 3 placebo vitamin C 4 vitamin C vitamin C?  plo47