http://www.nbcnewyork.com/news/local/Eric-Schneiderman-Herbal-Supplements-New-York-Walmart-GNC-Walgreens-290640551.html
In many cases, the herb customers thought they were buying could not be verified as even being present. "Contaminants" were the only ingredients found. One contaminant was walnuts. Imagine having a nut allergy and taking that capsule!