Functional Diagnostic Nutrition: Using Saliva Testing, Food Sensitivity Labs, and Lifestyle to Find Root Causes: Reed Davis, Board Certified Holistic Health Practitioner (HHP) and Certified Nutritional Therapist (CNT), is founder of Functional Diagnostic Nutrition (FDN). He discusses using functional testing alongside conventional care to uncover “dysfunction” when standard labs appear normal. Davis describes assessing adrenal and metabolic stress via saliva testing for circadian cortisol patterns, cortisol-DHEA balance, sex hormones, secretory IgA, and melatonin, emphasizing clinical correlation and individualized “studies of one.” He outlines an approach targeting multiple “healing opportunities” (H-I-D-D-E-N: hormones, immune, digestion, detoxification, energy, nervous system) and applying D-R-E-S-S (diet, rest, exercise, stress reduction, supplementation) rather than relying on supplements alone. A case example links chronic hives, medication-related weight gain, and food triggers identified through additional testing, including the Mediator Release Test. The discussion also covers stress-driven gut dysbiosis, digestion decline, and EFT tapping for stress-related symptoms, and notes FDN practitioners can be found via FDNtraining.com/medicine.
