A U.S. federal judge has allowed a lawsuit to proceed against Campbell Soup Co. over whether its “low-sodium” tomato soup actually has less sodium, Reuters reports. The world’s largest soup maker was sued by four New Jersey women last year who claim to have been misled into paying more for the “low sodium” brand, even though they say it has almost as much sodium as Campbell’s regular tomato soup. U.S. District Judge Jerome Simandle said the women could press claims under the state’s consumer fraud act. The lawsuit is seeking class action status. Campbell has said the allegations are without merit and plans to fight the case in court.