Why vitamins are essential to life: unravelling an ancient truth

... any of the vitamins led to different diseases - a lack of vitamin A to blindness, vitamin B12 to severe anaemia, vitamin D to rickets. Today, a huge amount of research goes into understanding vitamins, but most of it is focused on how much of them ...

http://www.theage.com.au/technology/sci-tech/why-vitamins-are-essential-to-life-unravelling-an-ancient-truth-20131210-2z33l.html