Not that far into it yet. So far thought the science discussed is awesome. That's part I get into. If I can wrap my head around why something works or doesn't work I can and will do it 100%. There's allot of similar points between CBL and PHD. PHD is more of a healing diet though for those with some metabolic damage which I can imagine would be helpful for trainers. I do see so many trainers who know there way around the gym but when it comes to diet, it's basic knowledge only and is probably even damaging for some of their clients.Anyway, well worth the time and money to get the book IMO.