I had suffered from depression for more than 25 years, off and on, and finally I was put on anti-depressants. I hated the side effects and eventually had to quit the meds. I came across this book, just a small mass produced paperback book and the information, although simple has changed my life. I no longer have mood swings, dark brooding periods or headaches. The author takes a lot of time to explain the physiology behind it all. If the science is too much for the reader than he/she can just get to the nitty gritty of it all. The method she proposes is simple for anyone to follow. My husband was very skeptical about a book changing one's life but I had no choice but to give a chance. I'm forever grateful to the author for writing this book. My family has a wife and mother now who isn't a Jekyll and Hyde show.