I am not aware of any lawsuits against distributors/retailers but supplement companies have been successfully sued in the past. One famous case is Yoel Romero v

I am not aware of any lawsuits against distributors/retailers but supplement companies have been successfully sued in the past. One famous case is Yoel Romero vs Gold Star Performance Products (https://bleacherreport.com/articles/2838434-ufc-fighter-yoel-romero-awarded-275m-in-lawsuit-over-tainted-supplement https://bleacherreport.com/articles/2838434-ufc-fighter-yoel...).