It’s always good to know that the work that ZRT has been doing for over 15 years in the field of salivary testing is still cutting edge and useful. Today I just wanted to share a few of the studies using salivary estradiol that are being published in the literature. Just a hint, if you want to search for articles on salivary testing use pubmed.gov and search saliva estradiol (or progesterone, testosterone etc.). Be aware that salivary hormone testing is so standard in the research world that rarely is it mentioned in the titles of the papers. Over 310 studies were published in 2016 using saliva testing – 61 studies for testosterone and 189 studies on cortisol, while poor progesterone was neglected with only 14 studies this last year.