Sold in capsule form, fish oil is the No. 3 dietary supplement in the U.S. While the label on the bottle may tout the benefits of fish oil, it won’t tell you where the oil came from. With roughly 20% originating in China, that could be a problem. In its investigative report, The Star reviewed every fish oil shipment from China to the U.S. from January 2009 through July 2010, using data compiled by Datamyne. Read the full Kansas City Star article here.