I'm not in the UK, but ordered the saliva test from a UK laboratory (Genova Diagnostics). And yes, I paid around 130 GBP for this analysis.
I have read about cortisol issues on many sites...to name but a few: Stop the Thyroid Madness, Thierry Hertoghe's website
www.hertoghe.eu, TPUK, Amy Myers, Westin Childs (functional US doctors)...also, British doctor B. Durrand-Peatfield mentions it in his book "Your thyroid and how to keep it healthy"...but he advocates using hydrocortisone for a very short time....a few weeks or maybe a couple of months. I stayed on it for two years and would still be on it if I had not weaned myself off it. I just did not feel comfortable staying on it any longer after reading about all the potential side effects...even on a so called "physiological dose"...
When I compare photos pre- and post-cortisone I can see that I have a much more "androgen" look now...which is a bit surprising considering my testosterone levels are well within range. But my face is now more square than oval (much more pronounced jawbone...related???), and I have been fighting to get rid of this "mustasch" for years...also a sign of PCOS/too much male hormones according to my sources. Plus, my skin is so oily it is shiny, and I have been trying to remedy that by buying all sorts of skin care products. So far, without any luck.
I guess this is all about the chicken and the egg...in my teens, in the mid 1980s, I had terrible sugar cravings which I gave into. I spent the next 20 or so years yo-yo-dieting...up 30 kgs, down 30 kgs, up 20 kgs, down 20 kgs...and so on and so on. Every time I saw a doctor I was told that I was "chubby, but not alarmingly so", and that things would normalise once I went on low fat diet and started exercising...although I was working out like crazy.
When I was 21, I went to see a doctor to get birth control pills because I could not stand my periods. They were not painful, but horribly heavy, and would last for +/-10 days...the doctor checked my blood pressure and said that, since it was borderline hyper, she could not prescribe the drugs...I spent the next ten years dieting, losing weight, gaining weight, losing a little less weight, gaining even more weight...until I was diagnosed with hypothyroidism (Hashimoto's) in my late 20s. Thyroid hormone replacement resolved some symptoms, but far from all.
My whole life, I have had borderline high blood sugar and insulin, but was told it would all go away "once I was on a low-calorie diet and exercising enough". In the years since, I have sometimes exercised to the point of ending up exhausted (jogging for up to two hours a day) without getting any results, while doctors told me I should "get my act together and start moving".
Looking back, and having read all the books and articles that I have now (written by patients or functional doctors), I am asking myself this: in my teens, did I start to overeat high carb foods because I lacked character, or simply because I was suffering from some hormonal disorder already in those days, causing blood sugar disorders...? Of course, there is no way of telling.