A popular question that InsideTracker users ask is when to re-test. We see testing frequency as a spectrum, ranging from the elite athlete, where even slightly outside-of-optimal results can mean the difference between a win and loss, to the casual InsideTracker user who only needs a check in now and then. Regardless of where you stand, we generally recommend re-testing 3 to 4 times per year. Another part of the re-testing process is the decision around which panel is most appropriate, and ...