I actually did a lot of research before deciding to eat high fat, low carb, moderate protein.
I was doing everything my doc told me to, eat low fat, more whole grains, jog 1/2 hour to 45 mins everyday... But still fat.
I was 120kg when I started. 1 year later, I was 64kg.
Weird thing is, I ate til I was full, never ever felt hungry, never counted counted calories. Did all my blood tests. Told my doc about my high fat diet. He said he didn't want to know, but whatever I was doing, keep doing it, cos he has never seen anyone's blood work improve like mine, even with medication.
Today, I do everything opposite of conventional wisdom: eat one meal a day (cos not hungry the rest of the time), no whole grains, lots of fat (only naturally occurring, saturated, polyunsaturated, monounsaturated, all whack), lift very heavy weights 2-3 times a week for very short duration...
It works for me...