The two manufacturers are accused of doctoring packaging and other paperwork to defraud others about what the product contained. Both claimed that their products, such as OxyElite Pro and Jack3d, were made from natural plant extracts even though they were wholly synthetic. "They made misrepresentations to convince well-known retailers, who had concerns about untested synthetic materials, to sell their products," said Benjamin Mizer, head of the Justice Department's Civil Division. "They falsified labeling and marketing materials to convince consumers who prized natural ingredients to buy their products." The department announced via Twitter at around 1 p.m. ET that it would make announcements related to dietary supplements case at 3:30 p.m. ET. The news sent the stocks of supplement sellers, including GNC and Vitamin Shoppe, plummeting in anticipation. Shares of GNC sank as much as 25.7% before rebounding and closing down 6.4%. Vitamin Shoppe's stock experience similar shocks, but to a lesser degree.