I had just written a long post describing this question and linking to various references on the internet I'd found about this issue, when my computer froze, I.E. shut down all the windows, and I lost everything. It's late/early so I'll have to be more brief this time around! (I did search for this topic in the archives here, but didn't find anything about the specific labs that do these tests.) Basically: I am looking to order without a doctor's help a saliva cortisol test that covers at least 4 collections in a 24-hour period. I have seen where some practitioners online have said they trust some saliva-cortisol testing labs more than others. They said that the results from some of the labs appear to be pretty inaccurate. I'd like to choose a test/lab that seems to be reliable and that people have been pleased with. I have also noticed that there doesn't seem to be much competition in the marketplace for the saliva cortisol tests that a private individual can order without going through a medical practitioner. There seems to be ZRT labs, which uses various middlemen who sell the test at various prices (I'm not sure if ZRT sells direct to the customer - clicking on their site was what seized up my computer). Of the ZRT middleman prices, I noticed about $110 at Canary Club, $150 at another place, and a couple of prices on Amazon (until tonight, I had not realized that lab tests were for sale on Amazon!) One naturopath offered two ZRT saliva tests online for anyone to purchase, but not the 4-collection cortisol on its own. Then, there seems to be a lab that works with Stop the Thyroid Madness for this test, and I think it was $108 or so through that website. It may not be a ZRT test - before I lost my open windows, I did not manage to identify the actual processor of the results. I checked with privatemdlabs.com but they don't seem to have one. Directlabs didn't seem to have one, but their search feature is terrible so you never really know with them. The Drs. Shames (thyroid specialists) say on their site that Bio-Health in California offers this test to private individuals, but according to Bio-Health's own site, that does not seem to be an option. I wouldn't mind going through a doctor to buy the test, if it merely entailed buying the test from the doctor's online shop. I just don't want to pay to have an initial medical consultation and to pay extra for analysis of the results. So -- --Any thoughts on the saliva cortisol (at least 4 measurements) test that has the best reputation and can be ordered without having had a consultation with a doctor? --Thoughts on where I would find the best price for this? Thank you!