In 2021, a lawsuit was filed against the company alleging that the ingredient Subway bills as "tuna" was a mixture of "various concoctions that do not constitute tuna, yet have been blended together by defendants to imitate the appearance of tuna". The company's senior director for global food safety and quality said in a statement that "Our restaurants receive pure tuna, mix it with mayonnaise and serve on a freshly made sandwich to our guests."[119]