Here is my problem with WL's UGL's book. He only used HPLC as a test. That in it's self is not a very accurate way of testing anything. It also does not show many organics and other compounds which have been found in some AAS that cause pain and could be potentially toxic. One other thing I don't like about the testing, is HPLC is only good for tell how much of stuff is in the sample, approximately. The only way to confirm exactly what the compounds are is you need to run an HPLC test with a known and pure substance to compare results with. If you do not, you can not be certain if the compounds being tested for are actually what they are labeled as. And in his book he provides no such comaprisons. So basically, we're all just taking his word for it. And personally, he has broke his word to me on a deal we made a while back. So for me, his word is shit.
If you don't believe me on the accuracy of HPLC, then look it up your self.