 Food science experts have pointed out that the level of azodicarbonamide permitted by the FDA for use in bread is too low to pose a significant risk.In June 2014, Hari posted a petition asking major brewers to list the ingredients in their products, something which U.S. brewers are not required to do.As part of this campaign, she claimed that commercial brewers "even use fish swim bladders" in their beer, as an undisclosed ingredient.