Contaminated herbal products

Herbal products are often contaminated, study finds

"Herbal medicines are frequently contaminated or contain plant species that are a substitute for the plants listed on the label or contain other species that may be a filler, a DNA analysis has found.

"Some of the herbal medicines analysed were contaminated with plants that have known toxicity or can interact with other supplements or medications, the study reported… "

http://www.bmj.com/content/347/bmj.f6138?etoc=

and...

http://www.biomedcentral.com/1741-7015/11/222 [full text, original article]

So much for "Nature is Best"!