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Here's another paleo diet study: Beneficial effects of a Paleolithic diet on cardiovascular risk factors in type 2 diabetes: a randomized cross-over pilot study It's from Lindeberg's research group but I'll refer to this one as Jonsson to distinguish it from the others.
In a randomized cross-over study, 13 patients with type 2 diabetes, 3 women and 10 men, were instructed to eat a Paleolithic diet based on lean meat, fish, fruits, vegetables, root vegetables, eggs and nuts; and a Diabetes diet designed in accordance with dietary guidelines during two consecutive 3-month periods. ... Study participants had on average a diabetes duration of 9 years, a mean HbA1c of 6,6% units by MonoS standard and were usually treated with metformin alone (3 subjects) or metformin in combination with a sulfonylurea (3 subjects) or a thiazolidinedione (3 subjects). Mean average dose of metformin was 1031 mg per day.
The paleo diet outperformed the diabetes diet, but that is not the purpose of this post, rather to show the composition of the paleo diet tested and add it to my summary table of same. Here are the diets compared. As with Lindeberg before this, we have a significant caloric difference between the tested diets that makes comparison difficult.