What did the find? Apparently a bunch of different things including (but not limited to): Arsenic, cadmium, lead, dexamethasone, ephedrine, cyproheptadine, paracetamol and snow leopard DNA. /applications/core/interface/imageproxy/imageproxy.php?img=http://www.nature.com/article-assets/npg/srep/2015/151203/srep17475/images_hires/w926/srep17475-f1.jpg&key=15289881dd68f909634cef8eb06352ef0b21d84e00a500280ba3c6e50078230f Good, but less science-y article here: https://theconversation.com/whats-in-your-herbal-medicines-52144 Science-y (methods and everything) article here: http://www.nature.com/articles/srep17475