Saliva testing is used for measuring hormones like cortisol, estrogen and testosterone, and its non-invasive collection asks patients to spit into a plastic tube. This sampling method allows patients to collect saliva at home at specific times, which is important for accurately measuring hormone levels. Collecting a saliva sample is a rather simple procedure and should take you no more than a few minutes to complete. We have created a saliva collection video to walk you through each step of the collection process to ensure the most accurate results. Learn more about ZRT’s saliva testing at