VitaWell Wellness functional testing focuses on physiological function (i.e. how the body functions at a molecular, tissue or organ level), rather than merely the presence of markers of disease. In most cases both methods of investigation are essential to draw a clear picture of the individual's cause of health problems and specific requirements and to re-establish balance using nutritional and lifestyle intervention. Functional tests have the advantage to facilitate the development of targeted therapeutic protocols, and to identify imbalances before they develop into illnesses. A test is most often non-invasive and typically involves a breath, blood, saliva, urine, or stool sample. Most samples can be taken at home, for example.