 Heineken's announcement came just prior to the release of her book, "The Food Babe Way" (February 10, 2015), that devotes a chapter to the ingredients—including caramel coloring—in some beers, wines, and liquors.In February 2014, Hari launched a petition on her website asking Subway to remove azodicarbonamide (a safe flour bleaching agent and dough conditioner) from their sandwich bread.The petition gathered more than 50,000 signatures in 24 hours.