I had terrible guttate psoriasis all over my entire body that morphed into plaqualar psoriasis--I suffered with it for six months, bad enough that I was bed-ridden. Even though I'd given up hope, someone bought me this book and I tried it. Using their diet "do's and don'ts" and supplement regimen (yes, it's like 60 vitamins a day. But when your body is crying out for help like that, severity is necessary). I was CLEARED...in three weeks. I almost wonder if the reason this is not known by all the world is because the insurance companies won't make money if everyone knew! Because, at least for me, this book really was a cure, and 4 years later, I've never had another outbreak. I combined this diet, by the way, with UV treatments (which had previously only helped temporarily).