From page 82 of â€œAdrenal Fatigue: The 21st Century Stress Sydromeâ€
â€œSergentâ€™s White Line (present in about 40% of people with adrenal fatigue)
This test was first described in 1917 by a French physician named Emile Sergent, as a simple test for low adrenal function that is still useful today. To do this test, simply take the dull end of a ballpoint pen and lightly stroke the skin of your abdomen, making a mark about six inches long. Within a few seconds a line will appear. In a normal reaction, the mark made by the pen is initially white but reddens within a few seconds. If you have hypoadrenia, the line will stay white for about two minutes and will also widen. This test, although not always positive in people with hypoadrenia (about 40% of cases) is a slam dunk confirmation of the presence of hypoadrenia.
Sergentâ€™s white line is only present in moderate to severe hypoadrenia and, in borderline cases, may only be present when the adrenals are at a low ebb.â€
Since I fail in a big way (i.e., the line never turns red but widens and stays white for over two minutes), it makes me pretty sure that I have adrenal fatigue (which would also account for my fatigue, and is also to be expected after being chronically ill for months/years from adverse statins effects).
Now, the possibility exists that that is ALL I had such that fixing that problem would perhaps have also fixed the hypothyroid issue (where the problem would have been inadequate absorption of adequate amounts of existing T3/T4 by the cells due to an inadequacy of cortisol in the blood from the adrenals). But at this point, I will continue with the schedule I have planned and get to adrenal concerns in a few weeks after trying to increase body temperature with thyroid hormone. (What cinbad writes makes good sense and that is what I will use as a guide.) It is my understanding that later I can go back to letting my thyroid gland do all the work (if the issue turns out to only be adrenal-related) by slowly cutting down on the exogenous thyroid hormone. You cannot depend on doing that with testosterone replacement â€“ the pituitary gland gets use to not sending out gonadotropins (i.e., FSH & LH) and will not reliably restart. However, apparently the pituitary does not get lazy about resending Thyroid Stimulating Hormone if you decide to let it run again. That is my current understanding. (Remember, there is no need for TSH if you are supplying its product with Armour.) But taking thyroid pills is no big deal anyway, so I will not be in any big hurry if I get my energy back in the deal.
BTW, the very next page is where he describes saliva testing as being the preferred test over urine and blood testing for adrenal issues. However, it appears that for Thyroid issues you will need to draw blood or use a Blood Spot test.
ZRT Labs is a good for both types of testing and will send you the kits for free. You pay when you mail them in. Spend some time on their website if you have the time (zrtlab.com).