A computer-implemented method including deriving a health profile of a user from a sample taken from the user and displaying a representation of the health profile on a display, wherein the representation of the health profile includes a list of undesirable oral health characteristics that are detectable from the sample. The representation of the health profile may also include a list of desirable oral health characteristics that are detectable from the sample. Furthermore, a user may select one of the undesirable health characteristics, and in response an indication of historical values associated within he selected one of the undesirable health characteristics may be displayed on the display.