Scientifically, it’s of limited use. However, in our community it’s fantastic news. Not that it tells us something we don’t know, or that we didn’t have studies as good or better in the past, but this is a widely reported paper giving us yet more ammunition in the fat wars. I think it’s great, even though I wouldn’t go around shouting that it’s proof of anything. It’s funny, though, that as soon as this started getting reported, the usual suspects (LCFH deniers on Twitter and the blogosphere) came out of the woodwork saying that this was nothing to pay attention to because it was merely an observational study based on food questionnaires. Conveniently forgetting that their own advice was based on the same kind of studies. At least we can throw that back at them.