With safety concerns widespread, Americans almost unanimously favor mandatory labels on genetically modified foods. And most say they'd use those labels to avoid the food. Barely more than a third of the public believes that genetically modified foods are safe to eat. Instead 52 percent believe such foods are unsafe, and an additional 13 percent are unsure about them. That's broad doubt on the very basic issue of food safety. Nearly everyone, moreover - 93 percent - says the federal government should require labels on food saying whether it's been genetically modified, or bio-engineered" (this poll used both phrases). Such near-unanimity in public opinion is rare. Fifty-seven percent also say they'd be less likely to buy foods labeled as genetically modified. The image problem of genetically modified food is underscored by contrast to organic foods. While only five percent of Americans say they'd be more likely to buy a food labeled as genetically modified, 52 percent say they'd be more likely to buy food that's labeled as having been raised organically. Genetically modified foods are particularly unpopular among women, another problem for food producers since so many women do the family shopping. Sixty-two percent of women think genetically modified foods are unsafe to eat, a view that's shared by far fewer men, 40 percent.