I have other books of Mr. Dogna, take control of your health. A friend advised me to take this one, but I find it too dense, too dense. I am a therapist, with a solid knowledge of naturopathy, homeopathy and aroma among others, but it's too heavy to clear to get an idea of the good elements. The bioassay is boring (I work kinesio :-)) but otherwise I did not serve me. As against the other volumes of take control of your health, I recommend for the novice and the pro.