I read a book a few years ago called "Pure, white and deadly" by John Yudkin (first published in 1972) that still has an incredible amount of relevant informati

I read a book a few years ago called "Pure, white and deadly" by John Yudkin (first published in 1972) that still has an incredible amount of relevant information in it. http://en.wikipedia.org/wiki/John_Yudkin http://en.wikipedia.org/wiki/John_Yudkin The main issue tends to come down to the mass production of food for consumption, and the market effects / economies of scale that it creates - the input to the digestive system changes rapidly, but the machinery is limited by the rate of human evolution.