Normal blood glucose ranges, normal cholesterol ranges, normal calcium ranges, nowadays it seems as if modern life depends on keeping all these “ranges” in some sort of arcane numerical boundaries in order to live long and happy. Not long ago no one worried about whether their normal blood glucose ranges were normal or not, they got up in the mornings, ate a pound of greasy bacon, three fried eggs, gravy, a couple of biscuits and washed it all down with a cup of strong coffee. Then it was off to work.