Eggs can carry Salmonella, and pasteurization is the food-safety process that kills it without cooking the egg. Pasteurized eggs are heated gently enough to destroy harmful bacteria while keeping the egg liquid, so you can use them in recipes that call for raw or lightly cooked eggs. For anyone who is pregnant, older, very young, or living with a weakened immune system, that difference matters a great deal.
Understanding why pasteurization works, who benefits most, and what the labels actually mean helps you make safer choices in your own kitchen. It also clears up a few common myths about raw eggs along the way.
Why Pasteurize Eggs Salmonella Risk And Food Safety?
Pasteurization exists because a raw egg can contain Salmonella, a bacterium that causes foodborne illness. The process uses controlled heat to kill that bacterium and other pathogens while leaving the egg’s physical and nutritional properties largely intact.
The key word is controlled. A hard-boiled egg is also heated, but pasteurized eggs are warmed to a precise temperature for a precise time — enough to reduce harmful bacteria to levels considered safe, but not enough to cook the egg white or yolk solid. The result is an egg that pours and behaves like a raw one but carries far less risk.
This matters because many foods people love are made with raw or barely cooked eggs: homemade mayonnaise, Caesar dressing, hollandaise, mousse, eggnog, and soft scrambled or sunny-side-up eggs. Pasteurized eggs let you make those foods with a meaningful safety margin.
How Does Salmonella Get Inside an Egg?
Salmonella can reach an egg in two main ways, and understanding them explains why washing the shell is not a reliable fix.
The first route is vertical transmission. A hen whose reproductive tract is infected with Salmonella can pass the bacteria directly into the egg before the shell ever forms. In this case, the bacteria are already inside the yolk or white. No amount of shell cleaning can remove them.
The second route is contamination through the shell. Salmonella can be present in chicken feces, and it may reach the shell’s surface. If the shell is cracked, or if bacteria work through the porous shell over time, they can reach the inside. This is why cracked eggs are considered a higher risk and are often best discarded or cooked thoroughly.
Because the first route puts bacteria inside a seemingly perfect egg, you cannot judge safety by appearance. A clean, uncracked egg can still carry Salmonella. That is the core reason pasteurization was developed as a commercial process rather than a home remedy.
Does Pasteurization Actually Kill Salmonella in Eggs?
Yes. Commercial pasteurization reliably reduces Salmonella in eggs to levels that food-safety authorities consider safe.
The method is a careful balance of temperature and time. Heat that is too high cooks the egg; heat that is too low or too brief may not kill enough bacteria. Commercial producers use validated time-and-temperature combinations that achieve a large reduction in Salmonella while keeping the egg from setting. This is a well-established industrial process, not an experimental one.
It is worth being precise about the word “kill.” Pasteurization is designed to reduce the number of live bacteria to a level that is very unlikely to cause illness — it is a reduction, not a guarantee of absolute sterility. That is why even pasteurized eggs are best handled with normal food-safety care, such as refrigeration.
One honest limitation: pasteurization targets bacteria like Salmonella. It does not make an egg safe for someone with an egg allergy, because the proteins that trigger allergic reactions are not the same thing as bacteria.
Which Eggs Are Pasteurized and How Do You Know?
Most eggs sold in the United States are not pasteurized. Standard shell eggs in the grocery case are washed and graded, but they are not heat-treated to kill Salmonella inside the shell. If you want pasteurized eggs, you usually have to look for them specifically.
Here is how pasteurized eggs typically appear:
- In-shell pasteurized eggs are sold in cartons clearly labeled as pasteurized. They often cost more than regular eggs.
- Liquid pasteurized eggs are sold in cartons as whole egg, egg white, or egg yolk, usually in the refrigerated section. These are common in food service.
- Dried egg products used in baking mixes and some packaged foods are generally pasteurized as part of manufacturing.
Read the label carefully. Terms like “natural,” “farm fresh,” or “cage-free” say nothing about pasteurization. Only an explicit “pasteurized” statement tells you the eggs went through the process. If a carton does not say pasteurized, assume it is not.
Who Benefits Most From Pasteurized Eggs?
Some people face a higher risk of serious illness from Salmonella, and pasteurized eggs offer them a lower-risk option for foods made with raw or lightly cooked eggs.
Groups that public health agencies generally identify as more vulnerable to foodborne illness include:
- Pregnant women, because infection can pose risks to both mother and developing baby
- Infants, young children, and older adults
- People with weakened immune systems from illness, medication, or treatment
For these groups, the guidance from public health authorities has long been to avoid raw or undercooked eggs. Pasteurized eggs give a way to enjoy recipes that would otherwise be off the table. That said, pasteurized eggs are not a substitute for medical advice — anyone in a higher-risk group should follow the specific guidance from their own clinician.
For a generally healthy adult, the risk from a raw egg is lower but not zero. Salmonella infection can still cause several days of fever, cramps, and diarrhea. Pasteurization reduces that risk for anyone who wants it.
Can You Pasteurize Eggs at Home?
Home pasteurization of eggs is possible in principle but difficult to do safely, and most food-safety guidance does not recommend relying on it.
The challenge is the same one commercial producers solve with precise equipment: holding the egg at a temperature high enough to kill Salmonella but low enough not to cook it. On a stovetop, it is very easy to overshoot and end up with partially cooked eggs, or to undershoot and leave bacteria alive. Without a calibrated thermometer and careful control, you cannot be confident the process worked.
If you want the safety benefit, buying commercially pasteurized eggs is the more reliable route. For recipes that require raw eggs, some people also use pasteurized liquid egg products instead of trying to treat shell eggs at home.
One clarification worth knowing: cooking an egg thoroughly — until both white and yolk are firm — also kills Salmonella. Pasteurization is mainly for the times you want the egg to stay raw or runny.
Does Pasteurization Change Nutrition or Taste?
Pasteurized eggs keep most of their nutritional value and behave much like regular eggs in cooking, though there can be small differences.
The heat used in pasteurization is mild compared with cooking, so the protein, fat, and most vitamins in the egg are largely preserved. Some people notice that pasteurized egg whites whip a little differently or take slightly longer to form stiff peaks, because the gentle heating can affect how the proteins behave. For scrambled eggs, baking, and most cooked dishes, the difference is usually minor.
There is a common belief that raw eggs are more nutritious than cooked ones. That claim is often overstated. Cooking does change some proteins and can reduce certain heat-sensitive nutrients slightly, but it also makes some nutrients easier to digest and, importantly, removes the Salmonella risk. The trade-off generally favors cooking or pasteurizing for safety.
How Should You Handle Eggs Safely at Home?
Whether or not your eggs are pasteurized, basic handling reduces the chance of foodborne illness. These steps reflect widely accepted food-safety guidance.
- Keep eggs refrigerated, and do not leave them at room temperature for long periods.
- Discard eggs with cracked or dirty shells, or cook them thoroughly if you keep them.
- Wash your hands and any surfaces that touch raw eggs.
- Cook eggs until the white and yolk are firm if you are in a higher-risk group.
- Avoid tasting raw batter or dough made with unpasteurized eggs.
The last point surprises some people. Cookie dough and cake batter often contain raw egg, so nibbling the spoon carries the same Salmonella risk as eating any other raw egg dish. Pasteurized eggs remove that specific concern.
Frequently Asked Questions
Are pasteurized eggs safe to eat raw?
Pasteurized eggs are treated to reduce Salmonella to levels considered safe, so they are the recommended choice for recipes that call for raw or lightly cooked eggs. They are not sterile, so normal refrigeration and handling still apply.
Do regular grocery store eggs carry Salmonella?
Standard shell eggs are not pasteurized and can carry Salmonella, either inside the egg or on the shell. The risk is generally low for healthy adults but higher for pregnant women, young children, older adults, and people with weakened immune systems.
Does cooking eggs kill Salmonella?
Cooking eggs until both the white and yolk are firm kills Salmonella. Pasteurization is the option for when you want the egg to stay raw or runny but still want a lower risk of infection.
Can I pasteurize eggs in my own kitchen?
Home pasteurization is hard to do reliably because it requires holding eggs at a precise temperature without cooking them. Most food-safety guidance recommends buying commercially pasteurized eggs instead.
