Egg Care: Refrigeration and Freshness
Eggs are a vital source of protein, but how should they be stored to maintain their quality and freshness? In this article, we explore the best practices for storing eggs, especially in relation to refrigeration, and address common misconceptions about egg care.
About Egg Bloom and Freshness
When a hen lays her egg, a protective coating called the bloom covers the exterior. This natural layer serves to prevent air, bacteria, and moisture from penetrating the egg, thus extending its freshness. However, this protective coating is often washed off commercial eggs in the United States to comply with certain food safety regulations. This washing process can reduce the egg’s shelf life significantly.
Despite the washing process, commercial eggs in the U.S. are required to undergo pasteurization and other treatments. In contrast, eggs sold in many countries with higher animal welfare standards like Europe do not need to be washed before sale. Consequently, these eggs can be stored at room temperature without compromising their freshness.
The Impact of Refrigeration on Egg Freshness
Refrigeration can indeed extend the shelf life of washed eggs, but it may not be the most effective method for keeping unwashed eggs fresh. In fact, studies have shown that unwashed, refrigerated eggs can lose freshness more quickly than those stored at room temperature.
For unwashed eggs, the comparison is stark: one day at room temperature deteriorates the freshness equivalent to seven days in the refrigerator. Keeping eggs clean, cool, and covered is the best way to maximize their freshness. If eggs are collected and sold each morning, they can be safely stored on the counter if intended for immediate use.
Although refrigeration is crucial for washing compliant eggs to maintain freshness, it may not be necessary for unwashed eggs. However, storage conditions should be monitored, especially if refrigeration is not an option. If the refrigerator is overcrowded, eggs can be temporarily stored at room temperature.
Long-Term Storage and Cocoon Coating
Naturally, hens will not incubate their eggs until adequate quantity for laying. This means that fertilized eggs can sit in the clutch for a week or more before incubation. The key here is that the bloom, although reduced, still provides some protection. Even eggs that have been sitting for up to two weeks in a cozy nest remain viable.
In the backyard, un-washed eggs can be stored in water to check their airiness. Eggs that float are considered old and should be discarded. Unwashed eggs tend to last longer than washed ones because they retain their natural protective coating. For long-term storage, some people use a solution of soda silicate, which dries into a protective coating preventing air from accessing the contents of the egg.
Conclusion
To summarize, the care and handling of eggs play a crucial role in maintaining their quality and longevity. While refrigeration is beneficial for washed eggs, unwashed eggs can be stored at room temperature without significant freshness loss. Proper handling, storage, and maintenance are essential for enjoying eggs at their best.