Possible Clues:

• Vitamin from arnica intensely revolting
• Vitamin A and C dropped into eyes, they said in news
• Important ingredient in DNA repair
• Vitamin B complex acid
• Acid murderer turned in
• Vitamin said to be practically a bad thing
• Vitamin of the B complex found in wheat and dairy products
• It fights pellagra
• Murderer rejected popular vitamin
• Vitamin supply in can containing source of iron