Hulda Regehr Clark, PhD, wrote six startling books and a lab manual, which challenge the basic theory of Western (conventional) medicine.  She says, that from her scientific research, she has found that ailments and diseases in our society are CAUSED by the entry of toxins and parasites into our bodies, from our environment.  She says that if we REMOVE those toxins and parasites (and keep them out) our bodies will CURE (heal) themselves.  

Conventional medicine concentrates on TREATMENT of a disease, which is a process of dealing only with the SYMPTOMS of an illness.  It reflects the ignorance of true causes of disease.  Clark shows the readers how to identify the toxins and parasites that have invaded their bodies, foods, and their personal environment, and then RID themselves of those toxins and parasites - hence, CURING themselves.