 The AAAS stated that mandatory labeling "can only serve to mislead and falsely alarm consumers".Groups such as the Union of Concerned Scientists and Center for Food Safety that have expressed concerns about the FDA's lack of a requirement for additional testing for GMO's, lack of required labeling and the presumption that GMO's are "Generally Recognized as Safe" (GRAS), have questioned whether the FDA is too close to companies that seek approval for their products.Critics in the U.S. protested the appointment of lobbyists to senior positions in the Food and Drug Administration.