"There was a theory, increasingly well supported, that eating is what killed you. They found that rats on extremely restricted diets, rats who ate very few calories, lived impressively long. They saw the same results with other animals, up to and including chimpanzees. They suspected, but could not prove, the same was true of humans. Every little bite of food was another step towards death."
Read more: http://www.digitaljournal.com/article/341150#ixzz2Htq0xcah