Reference Ranges


To help health care providers interpret test results, ZRT has established reference range values for analytes we test, based on the distribution of values observed in our collected laboratory data. For some analytes, in particular cardiometabolic risk markers, the reference range is based on published recommendations for normal values.

Some of our saliva test ranges include our observed ranges with certain types, routes, and dosages of hormone supplementation; these values are given for information only and are not recommendations for treatment.

Our complete reference ranges, and a document detailing how our saliva ranges are established, are available as downloadable, print-friendly documents below.