The most significant feature of saliva testing is that it measures the “unbound” biological active (bioavailable) or free hormone levels in the body – which is not tested for via blood testing. Blood testing measures the “protein bound” hormone levels in the body. In this bound state they are unable to fit into receptors in the body and are not delivered to the tissues. Therefore, bloods usually reflect the current reserve amount of hormone available rather than the current active hormone found in the tissues of the body. This is why we often see blood test results displaying hormones in “normal ranges” – however the signs and symptoms of our patients are suggesting otherwise.
4 saliva samples are collected throughout the day. For females this is generally done between days 19-21.
Similar to salivary hormone testing, the DUTCH test assesses the “unbound” biological active or free hormone levels in the body.
Unlike salivary testing of cortisol that indicates only high or low levels of cortisol, the DUTCH test measures how much total cortisol the body is making alongside cortisol metabolites. Another difference between the traditional saliva test and DUTCH testing is that it also assesses how the body is metabolising both androgens and oestrogens.
DUTCH testing gives us a clearer picture of adrenal and hormonal health by offering the most extensive profile of sex and adrenal steroid hormones, along with their all-important metabolites.
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