http://www.livescience.com/49713-her...ntroversy.html

hopefully supplement companies will document their quality control measures, i assume they better ones will do DNA fingerprinting of the raw materials and then check the finished product using gas or thin film chromatography. And what if the supplement mfg is already buying a highly processed product, i can't imagine someone making one of the multivitamin pills with a 100 ingredients buying the raw plant for everything.

But ginseng is ginseng, how processed can that be?

here's JARROW's response, a supplement mfg.
http://www.jarrow.com/articles/14/Total_Quality