[spoked451]

http://well.blogs.nytimes.com/2015/02/03/new-york-attorney-general-targets-supplements-at-major-retailers/

Shameful behavior by these retailers

Since this is multiple retailers store brands it's probably more like retailers pushing the suppliers on price, suppliers cutting corners and no one at the retailer bothers to see if the supplied product is genuine because they're making a killing on it.