Agree, hard to get it tested. I was interested as well but only some labs will do it, and wasn't the lab i normally went to. I think either needs special tube or special handling (cold?)- can't remember. I also figured wsn't worth my effort since they seem to never grasp the concept of "high for me" . So given my weight and protein consumption, i think my blood amomnia level would be way to high BUT in terms of test ranges. it undoubtedly would be "withink normal limits" and wouldn't be given another thought.
When I do urinary amino acid testing, they report ammonia levels. Mine are often in the 90 percent, even though tform amino acides, nearly all of mine are around the 2.5 percent mark, sometimes lower (exept for some awful ones but i digress).
At first i thought it was degraded sample since i sent it in over the summer but have since learned, nope, it's me, not the sample quality.