A large egg contains 6.3 grams of protein. That number shifts depending on egg size, and the protein splits unevenly between the white and the yolk in ways that matter if you’re choosing to eat only part of the egg.
Protein by Egg Size
Most nutrition labels and recipes assume a large egg, but the protein difference across sizes is meaningful if you’re eating several eggs a day.
- Small (38 g): 4.79 grams of protein
- Medium (44 g): 5.54 grams of protein
- Large (50 g): 6.3 grams of protein
- Extra large (56 g): 7.06 grams of protein
- Jumbo (63 g): 7.94 grams of protein
A three-egg breakfast with large eggs gives you about 19 grams of protein. Swap in jumbo eggs and you’re closer to 24 grams, a difference that adds up over a week without changing anything else on your plate.
White vs. Yolk: Where the Protein Lives
A single egg white contains 3.6 grams of protein at just 17 calories. The yolk carries the remaining 2.7 grams along with 54 calories. So roughly 57% of an egg’s protein is in the white, and the rest is in the yolk.
If you’re eating egg whites to cut calories, you’re getting a solid protein-to-calorie ratio. But you’re also leaving behind almost half the protein. The yolk also supplies fat-soluble vitamins, choline, and other nutrients the white doesn’t have. For most people trying to hit a protein target, eating the whole egg is more efficient.
Cooked Eggs vs. Raw Eggs
The protein in a cooked egg and a raw egg is the same on paper, but your body handles them very differently. Protein digestion from raw eggs is around 40% lower than from cooked eggs. Heat unfolds the tightly wound protein structures in egg whites and yolks, making them far easier for your digestive enzymes to break apart and absorb.
This means if you crack a raw egg into a smoothie, your body may only use about 3.8 grams of that 6.3 grams of protein in a large egg. Scramble it or boil it first, and you get significantly more usable protein from the same food. Cooking also eliminates the risk of salmonella, which is present in a small percentage of raw eggs.
Does Storage Affect Protein Quality?
Eggs stored in the refrigerator at around 4°C (39°F) keep their protein quality stable over time. Research published in the Journal of Agricultural and Food Chemistry found that the key proteins in egg whites, including the most abundant one (ovalbumin), remained largely intact under refrigeration.
At higher temperatures, it’s a different story. Eggs stored at body temperature (37°C) for 15 days showed significant protein breakdown. Ovalbumin degraded at over five times the rate seen in refrigerated eggs, and protective proteins that help maintain the firm structure of egg whites nearly disappeared. This doesn’t mean a few hours on the counter ruins your eggs, but long-term storage outside the fridge does reduce protein integrity and overall egg quality.
How Egg Protein Compares to Other Sources
Egg protein is considered “complete,” meaning it supplies all nine essential amino acids your body can’t make on its own. It scores extremely high on bioavailability measures, which reflect how much of the protein your body can actually put to use. Whey protein isolate matches or slightly exceeds egg protein in bioavailability, largely because its powdered form digests very quickly. Soy protein is also complete but scores lower on absorption.
Where eggs stand out is in whole-food form. A 3-ounce serving of cooked beef provides about 22 grams of protein, roughly the same as a three-egg meal, but eggs are cheaper per gram of protein in most markets and faster to prepare. Eggs are also rich in branched-chain amino acids, the specific amino acids most involved in muscle repair and growth.
For context, most adults need between 0.8 and 1.2 grams of protein per kilogram of body weight daily. A 70 kg (154 lb) person aiming for the middle of that range needs about 70 grams. Four large eggs at breakfast covers more than a third of that target before you factor in any other food.
Getting the Most Protein From Your Eggs
A few practical choices maximize what you get from each egg. Cook them in any form: scrambled, boiled, poached, or fried all deliver similar protein absorption. If you separate eggs, save the yolks for something else rather than discarding them. Buy the largest size your budget allows if protein is the priority, since jumbo eggs deliver about 66% more protein than small eggs. And keep your eggs refrigerated to preserve both protein quality and food safety.