I do remember reading in the 4 Hour Body about CT, brown fat and testosterone. I tried it for a while, but didn't notice significant improvement. This would be the most motivating thing for me. Maybe I'll try it again.
It may not be a common problem(a la how much I was teased when I complained about gaining muscle too easily at PH) but my grandmother often laments that she'll be around for a very long time, likely until she's well over 100. She's healthy, especially considering her age, but for her, it's a matter of watching all of her contemporaries get sick and die, to the point where visiting sick people and going to funerals makes up a significant portion of her time. I think the only thing that mitigates that is her large family.
Anyway, CT seems like a useful tool. I may give it a try(I'll report back if I do, with my result for people's reference, though they may be different, given I'm not in ketosis), just as I've recommended the Leptin Reset for people it seemed like a good fit for. I'm very happy for everyone having success with it.