In response to consumer concern about cholesterol, many food manufacturers are switching from highly saturated coconut and palm oils to vegetable oils that are low in saturated fats. That is to be applauded. But it doesn't obviate the need for more stringent food labeling rules.

Federal dietary guidelines urge consumers to avoid the artery-clogging tropical oils. Health groups have been urging manufacturers and fast-food chains to stop using them. In response, McDonald's, Burger King, Hardee's, Wendy's and Taco Bell have cut back. Many manufacturers of processed foods are doing the same.Unfortunately, this voluntary progress on oils has not been accompanied by changes in federal labeling requirements. By making manufacturers specify the oil used, Congress can encourage a healthy trend.