No time to comment, but this is what happens to mice on a high fat diet, IF YOU FORGET TO ADD THE SUCROSE. I have the full text (thank you Luca via THINCS), high fat diet was about 42% of calories from LARD. Oleic acid plus PALMITIC acid (gasp and shiver, oh cardiologist). And cornstarch, no sucrose. Prof Yudkin: Yu wuz right, agin.
BTW fed and fasting plasma insulin levels and obesity were worse in the high fat mice, but at 35% of calories from corn starch that's not surprising. There was no suggestion of the massive hyperinsulinaemia seen in sucrose feeding, but levels were definitely up.