Can anyone recommend a testing lab to determine the purity of a
supplement?

TIA,

Dave

[Testing labs are only set up to test amounts of pure substances. Thus, if a
supplement is stated to contain several chemicals, each would need to be tested
separately (which increases the cost of testing). In addition, not all labs are
set up to test all substances. Some substances require more uncommon methods of
testing. If the substance is uncommon, they may not have or be able to find the
"standard" for it and you may even need to help them out with that. In addition,
there is no such thing as general impurity testing. Instead these also have to
done for specific substances, so when asking for such testing one needs to
supply the names of the particularly impurities about which one is concerned.

For a start one should always consult Consumer Lab to see if the supplement has
already been tested by them. If not, then a lab that I have used is American
Analytical Chemistry Laboratories Corp - http://aaclabs.com (ask for Charlie
Li). There are many others which can be found by searching, but this is the only
one that I have used and can therefore recommend. They can do many kinds of
testing on the same substance and some require more that one kind of test to be
certain of its identity (eg. sterioisomers). Each such test is priced
separately.

Finally, insist that you be sent all raw test results and data so that you can
examine them and better understand what has been determined. If you do not
specifically request this, then they will only send you a very general summary
report of their results. --Paul]

[Dave Saum has fulfilled our identification requirements by virtue of the fact
that he uses his name in his email address, has an identifiable photo on his
Yahoo ID (since at least 2004) and provides a specific location. We have no
reason to believe he is not who he represents himself to be.

Dave, you are welcome to tell us a bit more about yourself, including what
mountains you are in and the ruins in the background in that photo. Someplace in
the Andes? **Kitty]