Yeah, this is more of a test of a protein-sparing modified fast. Blood sugar is behaving very well, no big surprise.

Too bad we can't see his insulin levels. If I had to bet, I'd say his insulin is lower, even if his blood glucose is the same. It wouldn't be hard to imagine a case where somebody's body could produce enough insulin to handle the carbs and protein that he's eating, but not enough to handle the increase in insulin needed to handle the combined carb/protein/fat load.