WASHINGTON (AP) -- U.S. health officials on Monday proposed a rule change that would require food manufacturers to notify regulators before introducing new ingredients or additives into processed or packaged foods. Ultraprocessed foods are made using industrial processing and additives, colors, preservatives or other ingredients not found in home kitchens. In the U.S., an estimated 10,000 additives are allowed in food, including thickeners, preservatives and packaging ingredients. However, the list of products deemed GRAS by companies grew to include many synthetic and natural additives, all incorporated into the food supply without independent review. Food industry officials contend their internal reviews of additives are as rigorous as the FDA's own process.