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I don't think Claire was advocating giving up a high protein intake as much as she was asking what this study could mean for diabetics.
I went back and re-read the link to the UK article she has shown us and it was very interesting. The article was saying that the specific action of protein releasing glucose in the small intestine creates "neuropeptides" or hormonal transmitters that tell the brain "HEY DUDE, STOP EATING". What made these findings significant was that carbs apparantly don't do this.
Now we all know from looking at the GI index, that most all foods get converted to sugar, its just a matter of how quickly they convert in our body as to how badly they will spike or affect our BS. White breads, rice, etc. actually are worse that plain ole sugar. Most high proteins are way down on the list. Lets remember the whole point of this article was summed up in the title, High protein diets curb hunger. They were not advocating that these diets release dangerous amounts of glucose for diabetics, in fact they point out that Carbs also release glucose in the small intestine but don't seem to have the "hunger curbing" hormone release that proteins do. Claire's question was a good one, "what does all this mean for diabetics"?
Im not sure that the article tries to address this but Im going to take a guess. Since the release of the Neuropeptides shuts down our hunger mechanism and we eat less, AND what we've eaten is way way down on the GI index, our BS stays low. THE EXACT OPPOSITE is true for carbs, according to the study.
Soooooo your experience as well as my own tends to be right on the money, simple carbs will always push our BS up.