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The shelf life of eggs in the refrigerator varies depending on the type of egg and storage conditions. Pasteurized liquid whole eggs can last up to 16 days, while ultrapasteurized and aseptically packaged eggs can last up to 6 months. Commercial and free-range eggs can be stored for up to 30 days under refrigeration. Proper storage conditions, such as maintaining a consistent temperature of around 4-6°C and using protective coatings, can significantly extend the shelf life of eggs.
Eggs are a staple in many households due to their nutritional value and versatility in cooking. However, understanding how long eggs can be safely stored in the refrigerator is crucial to prevent foodborne illnesses and maintain their quality. This article reviews the findings from various research studies on the shelf life of eggs when stored under refrigeration.
Shelf Life of Refrigerated Eggs
Pasteurized Liquid Whole Eggs
Pasteurized liquid whole eggs have been shown to remain acceptable for up to 12 days when stored at 2°C, based on total plate counts and odor assessments. No harmful bacteria such as E. coli, salmonella, streptococci, or staphylococci were detected in these samples1. Another study found that pasteurized liquid whole eggs could last up to 16 days at 4°C, with Pseudomonas becoming the dominant bacteria over time3.
Ultrapasteurized and Aseptically Packaged Eggs
Ultrapasteurized and aseptically packaged liquid whole eggs can have an extended shelf life of 3 to 6 months when stored at 4°C. This method maintains the chemical and functional properties of the eggs, making them comparable to raw eggs in quality4.
Commercial and Free-Range Eggs
For commercial and free-range eggs, storage conditions significantly impact their shelf life. Eggs stored at room temperature (26.6°C) begin to lose quality after 15 days, while those stored under refrigeration (6°C) can maintain their quality for up to 30 days5. Another study supports these findings, indicating that eggs stored at room temperature should be consumed within 2 weeks, whereas refrigerated eggs can last up to 8 weeks9.
Effect of Storage Conditions
The quality of eggs deteriorates over time, with significant changes in weight, albumen height, and Haugh units. Eggs stored at 5°C showed better preservation of these quality parameters compared to those stored at higher temperatures2. Additionally, the use of vinegar coatings (apple, lemon, and grape) can extend the shelf life of table eggs from one month to two months without negatively affecting their quality6.