Makes sense. I read that until 10000 years ago when humans developed agriculture, we were largely carnivorous, with carbs coming only from plant matter that was foraged.
Considering that 10000 years is practically nothing in evolutionary terms, we are currently eating a diet that is totally unsuitable for human beings.
There's a diet based around these ideas called the 'Paleolithic diet', which is pretty much a low carb, high protein diet.
It's interesting to note that wheat (gluten), peanuts and milk (lactose) are all artefacts of the onset of agriculture and wouldn't have been available to humans during the evolution process.
Maybe the reason that people have allergies to these products is because they're not part of our natural diet.
An interesting thing about the CD is that it partially adheres to this philosophy in that carbs are kept to a minimum, with the emphasis on protein and fat as energy sources.
Since CD is also low in fat, the body ends up using stored body fat for energy, but it's still the same process.
I can't help wondering about this current emphasis on a high carb, low fat diet being healthy. No wonder we get so many people with obesity, diabetes, coliac disease and IBS. Maybe it's from eating foods that are outside of our natural 'operating parameters'.
One thing that I have noticed is that people on low carb diets tend to look a whole hell of a lot healthier than they did when they were on high carb diets.