Even when eggs remain safe to eat, their quality can change as they age. Eggshells are porous, meaning small amounts of air can slowly enter the egg. Over time, this causes:
- Thinner egg whites
- Flatter yolks
- A slightly less fresh taste
These changes are natural and do not necessarily indicate spoilage. In fact, slightly older eggs can sometimes be better for certain recipes, such as hard-boiled eggs, because they are easier to peel.
How to Tell If Eggs Are Still Good
If you’re unsure about eggs that are past their date, several simple checks can help determine whether they are still usable.
1. The Smell Test
Crack the egg into a small bowl before using it. A spoiled egg will release a strong sulfur-like odor. If it smells normal, it is generally safe to cook.
2. The Float Test
Place the egg in a bowl of water:
- Sinks and lies flat: very fresh
- Sinks but stands upright: older but still usable
- Floats: likely spoiled and should be discarded
The floating effect occurs because air accumulates inside older eggs.
3. Visual Inspection
Discard eggs that show signs such as:
- Slimy or powdery shells
- Unusual discoloration
- Cloudy or foul-smelling contents
If anything looks abnormal, it is best not to take the risk.
When You Should Throw Eggs Away
Although eggs can last beyond the printed date, there are situations where they should be discarded immediately. For example:
- The egg has a strong rotten smell.
- The shell is cracked or leaking.
- The egg floats completely in water.
- It has been left unrefrigerated for several hours.
Additionally, vulnerable groups—such as pregnant women, young children, elderly individuals, or people with weakened immune systems—should be especially cautious and ensure eggs are fully cooked to reduce foodborne illness risk.
The Bottom Line
The “best-buy” date on egg cartons does not necessarily mean the eggs have gone bad. In many cases, eggs can still be safe to eat for three to five weeks when stored properly in the refrigerator.
However, freshness gradually declines, so it’s important to check eggs carefully before using them. Simple tests—such as smelling the egg, inspecting its appearance, or performing the float test—can help determine whether it is still good.
Ultimately, understanding how egg dating works can help consumers make informed choices, reduce unnecessary food waste, and continue enjoying this nutritious ingredient safely.
See more on the next page
