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Meta analysis of salivary Testosterone and cortisol finds mixed results.  The results are by no means uniform, but resistance training appears to trend to an increased salivary Testosterone and salivary Testosterone to salivary cortisol ratio.  Cardio trends the opposite.  This fits with prior literature on the types of exercise and hormone results.

Salivary hormone testing again shown to gold standard.  This study looked at salivary cortisol levels in those with Cushing's disease, Cushing's syndrome, and with adrenal incidentaloma.   The results make one scratch their head.  The sensitivity and specificities of salivary cortisol were very high, exceeding at least 94% with most > 96 and 97%.  So, why the opposition?  Ignorance I guess.

salivary testosterone via immunoassay shown to have sensitivity and specificity to be 100%.  Very reliable method to test for testosterone levels.

Study shows good predictive value, with very high correlation with free serum levels, of salivary androstenedione and salivary Testosterone levels in women with PCOS. This study suggests using salivary androstenedione:salivary testosterone be used in the diagnosis of PCOS.

salivary estradiol and progesterone used to assess women with infertility

salivary testing of hormones has proven to be reliable from initial reviews, 1982, to  current studies.  As this study points out, salivary testing has even been shown to be superior to other body fluids.  So, why the lack of use by the clinician?  not due to the research!

this study showed salivary cortisol to be an "excellent" means to evaluate both those with adrenal disease and adrenal dysfunction.  Salivary test is a good tool to evaluate the free active cortisol.

Salivary cortisol testing shown to have sensitivity and specificity that exceeds 90%.  Final Quote: "salivary cortisol will become routine in the evaluation of patients with disorders of the HPA axis

salivary testosterone, as measured by LC-MS and ELISA, showed strong correlation with serum free "calculated" testosterone.

"cortisol measurement is therefore a primary method of choice in the screening of patients suspected of having Cushing's syndrome".  This study compared plasma, salivary, and urinary tests.  salivary testing of cortisol is settled. Safe, reliable, and preferred method of evaluation.

study of 296 men with mean age at 22.7, have peak salivary Testosterone production in December and January. 

salivary testosterone found to be reliable in men and women during testosterone therapy.  The salivary testosterone levels correlated with serum.

this study looked at salivary testosterone to serum testosterone and found poor correlation.  One major problem with this study is the significantly smaller amount (10 fold) of testosterone in women than men in healthy individuals.  This study took place in postmenopausal women, which would have significantly lower levels than healthy women.  They also don't discuss the pitfalls of equilibrium dialysis of serum free testosterone.  Another major flaw is the mere logic of looking at serum for tissue activity.   What is the correlation between serum levels and tissue activity.  There is tremendous assumptions being undertaken that serum levels of testosterone whether total or free translate to genomic or non-genomic signaling.  I also wonder if newer techniques using Mass Spec can better detect the typically pico levels of testosterone in women's saliva?  This study does nothing to dissuade the use of salivary testing.

salivary cortisol found to be superior to total serum cortisol levels.

Salivary cortisol shown to correlate, significantly, with serum free cortisol.  This can be used as an alternative means to evaluate cortisol in those with septic shock, as this study did.  "Salivary cortisol testing is noninvasive, easy to perform, and can be conducted daily".

European journal of endocrinology article compared serum to salivary cortisol and found them to be equal, but due to ease of collection, salivary cortisol to be preferable.  This article was using cortisol to assess HPA axis dysfunction.

salivary cortisol is shown to be reliable for both Addison's and Cushing's Syndrome

salivary testosterone found to decline in women beyond the age of 39 with many women > 50 with low salivary testosterone levels.

Measurement and meaning of salivary cortisol: a focus on health and disease in children.

salivary testing of estradiol and progesterone shown to be statistically similar to blood estradiol and progesterone.  And, "salivary sampling is simple, convenient, and stress free".  End of debate.