 claiming USDA does not consider omega-3 and omega-6 fats to be ""agricultural ingredients."" Therefore, they argue, the ban against hexane extraction does not apply. The USDA helped them out by classifying those oils as ""necessary vitamins and minerals,"" which are exempt from the hexane ban. But hexane-extraction is just the tip of the iceberg. Other questionable manufacturing practices and misleading statements by Martek included:<br /><br />Undisclosed synthetic ingredients, prohibited for 