Eating expired eggs may not be harmful as long as they have been processed, stored, and cooked properly. Eggs can last beyond their expiration date if they are stored properly, but it is important to know the difference between expired but safe eggs and spoiled eggs that can contain harmful bacteria. Eggs that have been contaminated or stored improperly can spoil and contain harmful bacteria such as Salmonella. If you eat old eggs that have been damaged or contaminated, you are at risk of getting sick from contracting Salmonella. However, if the eggs are still fresh, they can be safe to eat for several weeks past their expiration date. To determine if an egg is still fresh, you can use the water test or check for any signs of contamination such as a foul odor, discoloration, or slimy eggshells. If you are unsure whether an egg has gone bad, it is best to throw it out to avoid the risk of food poisoning.