The Great Plains Laboratory, Inc. (GPL) is a research-based clinical laboratory that offers testing for nutritional and environmental factors in chronic conditions. Our state-of-the-art metabolic tests are not commonly available through other laboratories. Our tests are designed to find the root cause of the medical condition affecting the patient. This allows the medical professional to determine a treatment plan tailored to the personal health conditions of each patient. Our company was founded in 1996 and is currently serving more than 100 countries in the areas of integrative, functional and environmental medicine.