Myth or fact

The protein is in the egg white

Short answerSort of

By GyroscopeUpdated November 15, 20265 sources

Sort of. The white has more of the protein, but not all of it. A large egg has 6.3 g of protein: 3.6 g in the white and 2.7 g in the yolk. Throw away the yolk and you throw away 43% of the protein. Whites do win per calorie, with about 21 g of protein per 100 calories against 8.8 for the whole egg.

Why people believe it

Egg white has a reputation as pure protein. The yolk has a reputation as the fatty part. Bodybuilders made egg-white omelettes famous, and egg whites are sold on their own in cartons. It’s easy to assume the yolk is the part you can skip without losing anything.

The yolk is small, about a third of the egg by weight, but it’s dense. Gram for gram it has more protein than the white.

The numbers from USDA

Per 100 g, the yolk has 15.9 g of protein and the white has 10.9 g. The white wins on total protein because there’s twice as much of it. The yolk loses per calorie because of its fat.

Think of an egg as two people splitting a check. The white pays a bit more of the protein bill, 57%, and the yolk still covers 43%. Walk out on the yolk and you’re leaving a lot on the table.

Where the belief is right

If you’re counting calories, whites are one of the best protein foods there are. At 21 g per 100 calories they’re in the same group as shrimp, canned tuna, turkey breast and cod, and ahead of grilled chicken breast at 20.2. A whole egg, at 8.8, sits closer to cheese and milk.

On a hard diet, swapping some yolks for whites saves real calories. That’s the reason for the egg-white omelette, and for people cutting hard, it’s a fair habit.

Where it’s wrong

For most people, tossing the yolk throws away 43% of the protein to save 55 calories an egg. Eggs are also one of the cheapest protein foods in the US. At October 2026 prices, a dozen large eggs cost $2.32, which works out to about 77 cents for 25 g of protein, less than chicken breast.

Egg size changes the grams too. A small egg has 4.8 g of protein, a medium 5.5 g, a large 6.3 g, an extra large 7.1 g and a jumbo 7.9 g. Recipes and labels usually mean large.

How many eggs make a meal?

For most adults the meal line is 25 to 35 g. Three large eggs give 19 g. Add a 5.3 oz cup of nonfat Greek yogurt and you’re at 34 g, or add a slice of whole wheat toast and a few whites. The egg question has more.