Consumers may be throwing out perfectly good food based solely on the date on the package. Researchers at Johns Hopkins University surveyed over a thousand adults about how frequently they throw out food based on the date listed. Nearly 40% said they always or usually discarded food if it was near the listed date. More than half thought the date was federally regulated, but it's not. Experts say if the label says "best if used by," that just means the quality of the item may decrease, but is still okay to be eaten. A few items have a "use by" label and those are the ones that should be thrown out after the date for safety reasons. The U.S. Department of Agriculture says consumers and retailers waste nearly a third of food a year.