Shelton's booklet is the most frequently referred to text on the subject. Reprinted 31 times between 1951 and 1979.
This book was written after 25 years of clinical practice. Dr. Moser was not a rigid, doctrinaire natural hygienist. She incorporated into her practice what she considered the most useful aspects of many disciplines, including vitamins and other food supplements, protomorphogens, massage, accupressure, colonics, dietary restriction, etc.