Should you refrigerate or wash eggs? UK and US rules explained

Should eggs go into the fridge as soon as you get home? And should you wash the shells before putting them away? The answer is a useful example of why food-safety advice cannot always be translated directly from one country to another.

A recent study published in the International Journal of Gastronomy and Food Science examined food-safety knowledge, beliefs and myths among a sample of consumers living in Sicily. Questions included whether eggs should be refrigerated at home and whether they should be washed after purchase.

The study does not tell us how British or American consumers behave. The authors describe it as exploratory, and its convenience sample is not statistically representative even of the whole Sicilian population. What it does show is how apparently simple food-handling habits can become established beliefs.

Should eggs be refrigerated in the UK?

In the UK, the Food Standards Agency recommends storing eggs in a cool, dry place, ideally in the fridge. It also advises avoiding extreme temperature changes, because condensation on the shell can increase the risk of bacteria such as Salmonella passing from the outside of the shell into the egg.

The FSA also says not to wash eggs. Hens produce a natural protective coating on the shell called the cuticle, which helps prevent bacteria from entering the egg. Washing can interfere with this protection.

This may seem surprising when British supermarkets commonly sell eggs unrefrigerated. The important distinction is between the conditions eggs experience before reaching consumers and how they are stored once they arrive in the home.

Why are UK supermarket eggs not kept in the fridge?

An FSA review of the UK egg supply chain explains that eggs should not be chilled before reaching consumers because temperature variations can affect their quality and safety.

So “not refrigerated in the supermarket” should not be interpreted as “never refrigerate eggs”. They are different stages of the supply chain.

Should people in the UK wash eggs before storing them?

Routine home washing is not an extra safety step. UK and European production practices have traditionally relied partly on keeping the shell and its natural protective layer intact rather than routinely washing Class A eggs before retail.

The practical approach at home is to choose intact eggs, handle their shells hygienically, wash your hands afterwards and avoid unnecessary contamination of other foods and kitchen surfaces.

Why is the advice different in the United States?

American shoppers see something very different: supermarket eggs are normally sold from refrigerated cases. That is because the US production system is different. Commercial eggs are washed and sanitised during processing, and the refrigerated chain then needs to continue.

The USDA guidance on shell eggs advises consumers to buy eggs from a refrigerated case, refrigerate them promptly after purchase and keep them refrigerated. USDA also explains that a cold egg left at room temperature can develop condensation and that bacteria can multiply more readily when refrigeration is interrupted.

This is why adopting the same supermarket-storage logic used in parts of Europe would not be appropriate for US eggs.

Should Americans wash store-bought eggs again?

No. US commercial eggs have already undergone controlled washing and sanitising. Washing them again at home is unnecessary and may actually increase contamination risk if water is drawn through pores in the shell.

So for US households the message is straightforward: buy eggs refrigerated, take them home promptly, keep them refrigerated and do not wash them again.

Why do UK and US eggs follow different rules?

Because the two systems begin treating the egg differently before it reaches the kitchen. In the UK, retail eggs are generally not routinely washed and are not chilled before sale. In the US, commercial eggs are washed and sanitised and then distributed under refrigeration.

That difference explains an otherwise confusing sight: eggs on an unrefrigerated shelf in a British supermarket and eggs in a chilled case in an American one.

Neither approach means that one country’s eggs are inherently safer or cleaner. They are different food-safety systems that need to remain internally consistent.

What should home cooks remember?

The Sicilian study is useful because it shows how easily food-safety habits become automatic. For UK households, eggs should be kept somewhere cool and dry, ideally in the fridge, while unnecessary washing should be avoided. For US households, commercially sold eggs should remain refrigerated from purchase onwards and should not be washed again at home.

The apparently simple question “Should eggs go in the fridge?” therefore has a different context on the two sides of the Atlantic — and that difference starts well before the eggs arrive in your kitchen.