NBC New York is reporting on an investigation by the NY Attorney General into health food supplements where as little as 4% of the products contain the herb on the label.

EXCERPT

Numerous store brand supplements aren't what their labels claim to be, an ongoing investigation of popular herbal supplements subjected to DNA testing has found, New York state's top law enforcement official said Tuesday.

GNC, Target, Walmart and Walgreen Co. sold supplements that either couldn't be verified to contain the labeled substance or that contained ingredients not listed on the label, Attorney General Eric Schneiderman's office said.

SOURCE

http://www.nbcnewyork.com/news/local/Eric-Schneiderman-Herbal-Supplements-New-York-Walmart-GNC-Walgreens-290640551.html