Over the years I have explored, studied and used techniques for change and healing from different esoteric traditions originating from all over the world. They have ALL worked for me, and they all work for anyone who has a genuine intent to have a desired change. They are all based on the same universal principles that are pointed out even in the Bible and have been known long before the Bible was written. You may be familiar with the statements "As you believe, so it is", or "As you think in your heart, so it is" - belief is nothing more than that which you have accepted as true for yourself in your heart. In self-help book written throughout centuries, what you think in your heart has been replaced with words "subconscious", or "energy field" and while the author of DNA of Healing, sometimes uses these terms in her book, she has for the most part used the term "DNA" in that same context.
The methods described in the book DNA of Healing, also work because they are based on the same universal principles and for the most part, throughout the bulk of the book, the author is sharing the information that has been around for a long time, except that she uses the DNA slant. Other books may say you're programming your subconscious mind, or your energy field (and there are many other terms in other esoteric traditions for the same thing), the author here is guiding you through the programming your DNA. Putting a different label on the same thing doesn't make the process revolutionary, or turns it into cutting edge technology.
Over the years as I studied different techniques for change, I have encountered some that were very complex, some involved all sorts of external rituals, and some involved all sorts of internal rituals - and I have come to appreciate those that were the simplest. All that complex things do is perhaps enhance the belief system of those who have difficulty believing that something as utterly simple as a genuine heartfelt intention can be effective.
In this book, the author has taken that which is simple and turned it into a more complex process. She suggests that the problems you may be experiencing originate in your past and are passed genetically to you through your ancestors and that the most effective way to eliminate them is by revisiting, shall I say, the original sin, and eliminating it. The Five-Step Process involves kind of a "paint your past by numbers" method akin to looking up an oracle (using a Tarot card, I Ching, or simply opening a dictionary and randomly picking a word, or even playing word-association game may do the same trick) to find which ancestor may be to blame for the original sin, the consequences of which you are suffering in the present moment - at which point you go thorugh a process like ablution of sins to clean the slate and create a life you desire.
to create the "paint your past by numbers", the author has assembled bits and pieces from other traditions and therapeutic modalities and used them primarily as a framework - five elements from Chinese tradition, seven chakras from Indian tradition, Jungian archetypes. This diversity of elements is perfect for a writing workshop and reminds me of the books for screenwriters for generating ideas - you have a list of a number of characters, a list of possible plots, a list of elements for building drama, etc. In the same way, the five elements from Chinese tradition, seven chakras from Indian tradition and Jungian archetypes are mentioned in this method to help you create your personal genetic history. The method may be as valid as any other for pulling the information out of your subconscious - after all the dreams you dream at night are created in pretty much the same manner. Now that you have a clear image the culprit who is obstructing your present happiness, you can proceed to get rid of him.
Throughout the book are dispersed blurbs from research related to DNA, however they do not tie in directly with the method of transformation described in this book. The mention of research related to DNA is mainly incidental. These blurbs contain a generic idea that your thoughts and emotions influence your body. If you've had any brush with metaphysics, there is nothing revolutionary in this idea. If you've never used your mind to intentionally created changes in your body and in your life, then the idea may seem very well revolutionary to you.
As I said, over the years I have come to appreciate simpler methods. I used to practice complex methods because they can be fun, but then long time ago I have discovered that it was enough to intend an outcome and it would happen, so I changed my approach. As for the books for change that are more my cup of tea that this one - one is from another Ruby - Door of Everything by Ruby Nelson, A Course in Miracles (guaranteed to wipe your slate clean), Instant Healing and Urban Shaman by Serge Kahili King, Life and Teaching of the Masters of the Far East by Baird T. Spalding.
For those who still like to go visiting the origin of the problem, there is a lovely book by Irene Hickman, Mind-Probe Hypnosis. If you like to play with your imagination and work with five elements - there are a variety of fun books and videos by Mantak Chia - like Fusion of the Five Elements. For Jungian archetypes, among other books, there is a good book "Working with Archetypes", and there are many great books on working with chakras - I like "Advanced yoga practices - easy lessons for ecstatic living". Donna Eden's book and set of videos on "Energy healing" is awesome also.