Advanced testing can really vary by the patient's previous medical tests and history. Some of the more common "next level" tests include glutathione, Comprehensive Digestive Stool Analysis (CDSA), (Tumor Necrosis Alpha (TNFa), C-Reactive protein, urinary porphryins, pterins, endocrine, autoimmune, ASA titers, anti DNAse antibodies, copper/zinc ratio, oxidative stress, methylation, metabolic diseases, myelin, basic protein, viral titers, testosterone, ammonia and oxalates.

Make sure you know how to use your medical insurance to get most if not all of the tests covered.