A couple things... first, there is no connection between levels of the chemicals you are describing and 'neurotransmitter levels'. I'm not sure where the sample was taken... blood? Urine? Spinal fluid? Brain tissue? Hopefully not the latter! I suspect you are talking about blood levels-- urine levels would be even more worthless, although blood levels alone are worthless. It is not difficult for any cell in the body to make many of the substances that you listed; some are specifically from gonadal tissue (testes or ovaries), and some from the adrenal gland, and some from pretty much everywhere (glycine). Some of these compounds have dual functions, including a role as neurotransmitter in the brain... but getting blood levels tells you absolutely nothing about the brain levels. The 'blood brain barrier' separates the brain fluids from the blood...but that isn't even the issue! You have tons of circulating serotonin, norepinephrine, glycine, etc... but it doesn't even come from the brain--it is made all over the place, particularly the sympathetic ganglia and the adrenal gland.
I have heard the layperson's talk about 'depleting neurotransmitters'- say during addiction, etc... but it is all nonsense. Yes, in
Parkinson's there is a depletion of dopamine, not from the inability to make it, but because of the destruction of cells that contain dopamine. And yes, meds that block breakdown of acetylcholine will reduce the progression of
Alzheimer's for a few months, but again, this is a case of massive cell death throughout the brain-- nothing at all like the situation in people without that specific disease.
But beyond all of this... we do check levels of some of the chemicals you describe- not to treat psychiatric illness, but for endocrine conditions. But your numbers are all off! Here is a pretty good source for normal lab values:
http://www.aids.org/factSheets/120-Normal-Laboratory-Values.html Note, though that for DHEA for example the results are in the standard format of nanograms per deciliter (ng/dl). Taking your value of 1717 pg/ml and converting it, you get a value of 170 ng/dl, which is in the normal range-- if anything on the low normal side of things. Most of your listed 'normal ranges' are not at all accurate; Testosterone varies by 10-fold or more in normal individuals, for example. And glycine levels have nothing to do with anything!
I fear that you have a chiropractor who has learned something from a course that he took in Arizona-- he learned how to make some extra money by billing for bogus lab tests in trusting individuals! That guy deserves the boot!