The Center for Food Safety, a Washington, D.C.-based advocacy group, and 20 other health, environmental, and agricultural organizations last week filed a citizen petition with the Food & Drug Administration calling for a reversal of the agency's 1993 approval of Posilac, Monsanto's bovine growth hormone (BGH) product. The petitioners assert that evidence not fully considered by FDA when it approved Posilac—which is injected into cows to increase their milk production—indicates that more human health testing is needed. FDA has to respond to the petition within 180 days. A Monsanto spokesman says the petition contains no new information, that it is a continuation of the opposition to BGH by a variety of activists, and that the safety of BGH for both humans and cows has been thoroughly addressed and confirmed by many regulatory bodies in the U.S. and overseas. Monsanto's BGH is a slightly modified, bioengineered version of a natural protein produced in the pituitary gland ...