The Float Test Myth
Your Floating Egg Might Be Fine
Why a floating egg is older, not automatically spoiled
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The Myth Everyone Repeats
Kitchen lore says: if it floats, toss it. But food scientists say a floating egg is not automatically spoiled. Floating means older, not rotten.
Source: Egg Safety Center
Why Eggs Float With Age
Eggshells are porous. As an egg ages, CO2 and moisture escape and air enters, inflating the air cell inside. A bigger air cell means more buoyancy.
What the Carton Date Actually Tells You
Best-by dates mark peak quality, not a hard safety cutoff. The USDA says a refrigerated egg can remain safe for several weeks beyond that date. A floating egg may still fall well within that safe window.
Source: Food Republic
The Real Test: Crack and Smell
Crack a floating egg into a bowl. If it smells off or the white looks green or pink, discard it. A fresh smell and bright yolk means it is safe to cook.
Source: Egg Safety Center
What a Sinker Tells You
A fresh egg sinks flat on the bottom. A slightly older egg tilts upright. Both are fine to eat. A floater just needs a quick sniff test before use.
Cloudy White Means Ultra Fresh
A cloudy white means CO2 is still dissolved in the albumen: the egg is very fresh. As CO2 escapes through the shell over days, the white gradually clears. A flat, spread-out yolk just signals a slightly older egg.
Source: Food Republic
On a Multan morning, trust your nose. A good-smelling egg is a good egg, float or no float.
References
- Egg Safety Center eggsafety.org
- University of Nebraska-Lincoln Extension extension.unl.edu
- Food Republic foodrepublic.com
- Egg Safety Center eggsafety.org
- University of Nebraska-Lincoln Extension extension.unl.edu
- Food Republic foodrepublic.com
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