Anyway I spotted this story today:
New findings measure precise impact of fat on cancer spread
Researchers at Purdue University have precisely measured the impact of a high-fat diet on the spread of cancer, finding that excessive dietary fat caused a 300 percent increase in metastasizing tumor cells in laboratory animals.
interesting....it might put you off eating fat! BUT when you read on a bit beyond the headline you find out that it is not all fat that is the problem....it is polyunsaturated fat! That is supposed to be the healthy fat.
The researches used the imaging and cell-counting tools to document that linoleic acid, which is predominant in polyunsaturated fats, caused increasing membrane phase separation, whereas oleic acid, found in monounsaturated fats, did not. Increased membrane phase separation could improve the opportunity of circulating tumor cells to adhere to blood vessel walls and escape to organs far from the original tumor site. The new findings support earlier evidence from other research that consuming high amounts of polyunsaturated fat may increase the risk of cancer spreading.
So all these people getting rid of butter and scoffing their "healthy" margarine do not know what they are risking.
As usual of course Barry Groves is ahead of the pack on this one: Polyunsaturated Oils Increase Cancer Risk