Why Use Saliva?
Saliva testing is an easy and noninvasive way of assessing your hormone status and balancing needs and is proving to be the most reliable medium for measuring hormone levels. Appreciating the reliability of saliva testing is based on understanding the difference between steroid hormones in saliva and serum. This difference is based on whether or not the hormones are bound to proteins in the medium used for testing. The majority of hormones exist in one of two forms: free (5%) or protein bound (95%). It is only the free hormones that are biologically active, or bio-available, and available for delivery to receptors in the body. Those which are protein bound do not fit those receptors and are considered non-bioavailable. When blood is filtered through the salivary glands, the bound hormone components are too large to pass through the cell membranes. Only the unbound hormones pass through and into the saliva. What is measured in the saliva is the bioavailable hormone, the clinically relev
