Wilson's supplement's are good, not cheap, but I didn't realize they were making as much of a difference as they were until I ran out of them. I also recommend his book--and an ND. I haven't done it yet, but there are spit tests for testing the adrenals.
I had 4-5 blood tests for thyroid, and nothing showed out of the ordinary- my ND picked up immediately with muscle testing that my thyroid/pituatary/hypothalmus were all low and put me on supplements for them. We're testing adrenals the next time I go in. He said he can catch it at the cellular level, before it ever shows up on a medical blood test.