If it works for you that's great, but I scanned through the five rules and it basically looks like good-old garden-variety calorie restriction. I personally think it's a little disingenuous to pin diet effects on body recomposition on just one hormone since there are at least ten main ones and lots more little ones, but I can't complain too much about the rules. The only one I disagree with is the "don't eat after dinner" rule but hey, if it helps you cut calories, then go for it.
1) eat real food - more vegetables, moderate meat, moderate fruits, less grains, less sugar, less vegetable oils.
2) exercise - moderate intensity cardio, sprinting, heavy lifting, dedicated stretching and mobility.
3) live - relax, de-stress, meditate.
Disclaimer: I'm not professionally qualified to make any formal recommendations. I've just done my homework and I'm my own guinea pig. All of my data, unless otherwise cited, comes from a sample size of n=1 (me).