Many years before most illnesses occur, there is a steady, cumulative, measurable decline in body function. By the time you need a cardiogram, you may already have heart or circulation symptoms, by the time you have a GI issue, you may already be experiencing some type of digestive issues.
Even so-called preventative testing such as mammograms (see thermography instead) and cholesterol screenings are really tests for early disease rather than true prevention.
Naturopaths use many noninvasive, functional tools to look at the function of systems rather than disease and use natural, biological approaches that are designed to assist the unique body’s ability to experience optimal health and wellness.