Effects of a short-term intervention with a paleolithic diet in healthy volunteers
Looking at the results in the full study, there are some interesting bits.
In terms of macro nutrient ratios the diet went from 13.5% / 54.3% / 29.6% protein / carbs / fat to 23.9% / 40% / 35.8% (% of calories). Total energy intake went down from 2478 to 1584.
I suppose if you wanted to link the changes in blood lipids etc to the diet you'd have to make is iso-calorific. Otherwise all we can say is that taking in fewer calories has an effect.....
Interesting anyway and worth reading. UPDATE Br Briffa comments on this here. And of course the establishment do not like it!