Vegetarian Indian immigrants to Great Britain began to suffer from pernicious anemia not long after their arrival. It was discovered that the cause of the disease was the overly-hygienic dried fruits and packaged foods they were consuming in Britain. Back in India, there were minute amounts of insect parts in the dried fruits, and this provided them with enough Vitamin B, to prevent anemia. Once food is sterilized, sanitized, freeze-dried, artificially colored and preserved (all untouched by human hands), it is probably no longer fit for consumption anyway.
What causes pernicious anemia?