Established in 1987 by Dr. Elias Ilyia, Diagnos-Techs is the leading salivary-based testing and research laboratory in the United States. In 1989 Diagnos-Techs was the first laboratory to introduce salivary-based hormone testing into routine clinical practice , and in 1995 added salivary-based gastrointestinal and food intolerance testing. A pioneer and leader in saliva-based testing, Diagnos-Techs is committed to assisting health care professionals in restoring patients' health and wellness by offering powerful tools for evaluating stress, hormone-related disease and health conditions.