A fresh egg will lie flat at the bottom, while an older egg will stand upright or even float due to the buildup of air inside the shell. Bloom In the United States and Japan, food safety regulations demand that all commercial eggs be washed immediately after being laid.
Comparing Global Egg Storage Standards: Why Some Countries Refrigerate and Others Don't
If you left a US egg at room temperature for more than two hours, it enters the "danger zone" where bacteria multiplies rapidly. Rather than washing the eggs, producers leave the bloom intact.
This natural coating is incredibly effective, acting as a barrier that keeps bacteria out while locking moisture in. The journey of an egg from the farm to your refrigerator is a battle against contamination, and the methods used determine whether refrigeration is mandatory or optional.
How Global Egg Storage Practices Vary by Country Due to Washing and Refrigeration Rules
The Battle Against Bacteria: Washing vs. Because this vital shield is stripped away during the cleaning process, the eggs must be refrigerated immediately to slow bacterial growth and keep the interior safe to eat.
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