People reading here will probably be aware of the French Paradox. This so-called phenomenon comes about because the French east masses of saturated fat yet have the lowest rates of heart disease in Europe.
It strikes me that the doctors and researchers who cling to the notion and are baffled by it wouldn't recognise they'd been slapped in the face with a wet fish, having just been slapped in the face with a wet fish!
To illustrate this have a careful look at the graph. It's from Dr. Malcolm Kendrick's latest blog post. It's a reassurance that far from being a heart killer, the more you eat the better your chances. The poor folk of Georgia either have got the low-fat message or maybe butter etc is beyond their reach (or maybe both!).