One large egg contains about 6.3 grams of protein. That’s the standard egg size sold in most grocery stores, weighing roughly 50 grams. But the exact amount shifts depending on egg size, and how you cook it changes how much of that protein your body actually absorbs.
Protein by Egg Size
Egg sizes are standardized by weight, and protein scales proportionally:
- 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 two-egg breakfast with large eggs gives you about 12.6 grams of protein, and stepping up to jumbo eggs pushes that close to 16 grams. For context, most adults need somewhere between 46 and 56 grams of protein per day, so two large eggs cover roughly a quarter of that target.
White vs. Yolk: Where the Protein Lives
People sometimes toss the yolk thinking the white has all the protein. That’s not quite right. The egg white is about 11% protein by weight, while the yolk is actually more protein-dense at about 16% by weight. The white just happens to be the larger portion of the egg, so it contributes more total protein in absolute terms.
In a large egg, roughly 3.6 grams of protein come from the white and 2.7 grams from the yolk. If you’re discarding yolks to cut calories or cholesterol, you’re also leaving behind over 40% of the egg’s protein along with most of its vitamins and minerals.
Why Egg Protein Is Rated So Highly
Not all protein is created equal. Your body needs nine essential amino acids from food, and eggs deliver all of them in proportions that closely match what humans require. Nutritional scientists use a scoring system called PDCAAS to rate protein quality on a scale. Eggs score 118% for young children, compared to 92–94% for meat and fish, 90–93% for soy, and just 35–57% for grains like rice and wheat. Any score at or above 100% means the protein fully meets amino acid requirements.
Eggs are particularly rich in leucine, the amino acid most responsible for triggering muscle repair and growth. A single large egg provides about 545 milligrams of leucine. They also supply meaningful amounts of lysine, valine, and isoleucine, all of which support muscle maintenance and recovery. This amino acid profile is one reason eggs are a staple for people focused on building or preserving muscle.
Cooking Nearly Doubles Protein Absorption
Raw eggs are far less useful to your body than cooked ones. Research published in The Journal of Nutrition found that your body absorbs only about 51% of the protein from a raw egg, compared to roughly 91% from a cooked egg. That means a raw large egg effectively delivers around 3.2 grams of usable protein, while a cooked one gives you closer to 5.7 grams.
Heat changes the structure of egg proteins, unfolding them in a way that makes them far easier for digestive enzymes to break down. The cooking method doesn’t matter much for protein content. Scrambled, boiled, poached, or fried, the protein stays essentially the same. What changes with frying is the added fat and calories from oil or butter.
Eggs Compared to Other Protein Sources
A large egg packs its 6.3 grams of protein into just 72 calories, making it one of the more protein-efficient whole foods available. Here’s how it stacks up against common alternatives for a quick comparison:
- One large egg: 6.3 g protein, 72 calories
- One ounce of chicken breast: about 8.5 g protein, 46 calories
- One ounce of Greek yogurt: about 2.9 g protein, 17 calories
- One tablespoon of peanut butter: about 3.5 g protein, 94 calories
Chicken breast is leaner per gram, but eggs require zero prep if you hard-boil a batch ahead of time, and they cost a fraction of the price per gram of protein. For most people, eggs work best as part of a varied protein strategy rather than a sole source. Three eggs a day plus a serving of meat, fish, or legumes at another meal comfortably covers most adults’ daily protein needs.