I worked in Labs doing parasite tests and even conducted a parasite survey in Bolivia. In my 40's I had debilitating health problems and found Clark's book and , although I had undiagnosed Celiac Disease, Clark's programs brought me back so that I could work again. Her research found that people had great variety of parasites almost anywhere in their body and always associated with the parasites were toxins and pollutants and sometimes other organisms. Most of these people were cured or improved greatly by Clark's protocols. Before reading Clark's books I had thought that alternative methods were bunkum, wild claims for profit but changed my mind when her reports confirmed some of the observation I had made in the laboratory. My advice is to keep an open mind about what is causing your symptoms and if you can't find which parasites are the culprits then do broad spectrum parasite programs (may take several kinds) and detoxification programs. Good Luck!