what is the most accurate hormone testing saliva or blood
Saliva testing is the most reliable way to measure free, bio-available hormone activity â those hormones actually doing their job at the cell level. Most blood tests do not measure âbio-availableâ 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. Serum blood and urine assays significantly underestimate hormones delivered topically, often resulting in overdosing.