Essentially, these mice were genetically predisposed to cancer and were fed in two groups. A low carb-high protein group (55 % carb 23 % protein, 22 % fat) and a 'western' diet group (15% carbs, 25% fat, 60% protein).
A couple interesting results:
1. By middle age half the mice eating the western diet had tumours, none of the low carb-high protein group did.
2. Only one mouse eating the western diet reached the normal life span. Half the other mice reached or exceeded their expected lifespan.
3. 70 % of the western diet mice developed cancer compared to 30% of those on the low carb diet.
4. And a little blow to calories in calories out, the researchers noticed that while the calories were kept the same, the mice on the western diet gained alot of weight.
Now this is a mouse study and has to be taken with a grain of salt but still interesting.
Hyperlipid wrote a blog post that calls the researchers out on their flaws: