How accurate is Saliva Testing?
Saliva testing has been used in scientific testing for decades and has been shown to be highly accurate. The World Health Organization has used this method of hormone testing in worldwide comparisons of breast cancer among women living in industrialized vs. non-industrialized countries. Many studies in the scientific literature have shown a strong correlation between the levels of steroid hormones in the blood stream and the "bio-available" (free) levels of steroid hormones in saliva

Saliva testing is the most reliable way to measure free, bio-available hormone activity- those hormones actually doing their job at the cell level. Most blood tests do not measure "bio-available" hormone levels. In addition, saliva hormone testing more accurately reflects tissue uptake and response of hormones delivered (topically) through the skin, in creams, gels, or patches. Blood and urine assays significantly underestimate hormones delivered topically, often resulting in overdosing. When a person does the testing, we ask him/her to fill out a listing of symptoms according to severity; we also ask for information about menstrual history and current hormone usage so as to set the expected ranges. When the final report is put together symptoms are classified according to the category of hormone imbalance they fall into and are correlated with tested hormone levels. In the rare case that test results do not correlate with symptoms, the test is repeated for accuracy