Just had a long conversation on the phone with someone who is recovering from an operation to remove a bowel cancer tumour. She says when she questioned her surgeon about why she had it, since she eats healthily and gets plenty of exercise, has never smoked, etc., he said that there is a genetic element in susceptibility to this disease which westerners have and orientals don't. This is fairly new knowledge, it seems.
I have to say that it doesn't surprise me at all. I've never thought that differences in diet could be enough to explain the differences between populations. Ah well, time will tell, but I'm glad I have no sausage and bacon guilt (not that I eat them a great deal, but I'm not frightened of them as some people seem to be).
Seems to me genetic differences between historically separate human populations is a far more simple (Ockham's razor simple) explanation of western cancer propensities than differences in diet. Would epidemiological surveys have picked this up? Doubt it. I wonder how long the science that the surgeon knows will take to filter through to us common or garden types?
Anyway, I think it's good news.