In determining deficiencies, Dr. Willis uses a variety of tests. An in-depth Symptom Survey Form is the first step in the process. It will help her to prioritize system weaknesses so that specific glands and organs can be targeted. If more in-depth information is needed, Dr. Willis may also incorporate Hair Analysis and/or Saliva Testing. She has become proficient in interpreting these non-invasive tests through the Applied Clinical Nutrition program and finds them unbeatable tools in targeting deficiencies.