 In May 2007 , the Center for Science in the Public Interest ( CSPI ) sought a state @-@ level class action lawsuit against Burger King in the Superior Court for the District of Columbia over the inclusion of trans @-@ fats in foods served by Burger King and Burger King 's failure to set a definitive time line for their elimination from the company 's menu . The CSPI suit sought to require the company to place large heath warnings on Burger King 's food packaging that explained the dangers of trans @-@ fat and the levels of trans @-@ fat contained in its products . Burger King sought to move the case to the Federal courts and have the suit dismissed . The Federal Court denied the company 's motion for dismissal and sent the case back to the Superior Court for trial . To address the CSPI 's legal challenge , as well as several laws passed in New York City , Philadelphia and other cities regarding the issue of trans @-@ fats in its food , BK announced a plan in July 2007 to phase out all trans @-@ fats from its products by the end of 2008 . 
