You open the fridge, see the egg carton, and do the quick calculation: if I make three eggs, how much protein am I getting? The short answer is that a medium egg contains around 6.5 grams. The useful answer is a little longer, because size changes the figure quite a bit, the white and yolk don't provide the same things, and the way you cook it affects how much of that protein you actually absorb.
Here is the complete table by size, the white-to-yolk breakdown, what happens when you cook it, and how many eggs you would need to eat to cover your daily needs. With clear figures and none of the cholesterol drama, which stopped holding up years ago.
| Size (European standard) | Weight with shell | Protein per egg | Calories |
|---|---|---|---|
| S — small | Less than 53 g | ≈ 5.5–6 g | ≈ 60 kcal |
| M — medium | 53 to 63 g | ≈ 6.5 g | ≈ 72 kcal |
| L — large | 63 to 73 g | ≈ 7.5 g | ≈ 85 kcal |
| XL — extra large | 73 g or more | ≈ 8.5 g | ≈ 95 kcal |
| Per 100 g of egg | Without shell | ≈ 12.6 g | ≈ 143 kcal |
How many eggs provide your daily protein?
To give you an idea of the actual amount you need.
The exact figure depends on the size
When someone says “an egg has 6 grams of protein,” they are using the medium as a reference. But there is almost a three-gram difference between an S and an XL, which in a three-egg omelet amounts to nine grams: almost a full serving.
In Spain, the size is marked on the carton itself with the corresponding letter. It is a detail that almost nobody checks, and it changes your calculations.
One detail to watch out for: the weights in the standard include the shell, which accounts for around 11% of the total. The edible portion of an M egg is around 52 grams, not the 58 grams shown on the carton.
Egg white and yolk: what each provides
There is a common idea that the protein is in the white and the yolk is “just fat.” It is false, twice over.
| Part | Weight in an M egg | Protein | Concentration |
|---|---|---|---|
| White | ≈ 33 g | ≈ 3.6 g | 10.9 g per 100 g |
| Yolk | ≈ 17 g | ≈ 2.7 g | 15.9 g per 100 g |
| Whole egg | ≈ 50 g | ≈ 6.3 g | 12.6 g per 100 g |
Look at the last column: the yolk is higher in protein per gram than the white. The thing is, it weighs half as much, so it provides less overall. The white wins in quantity; the yolk, in concentration.
The yolk also provides everything else: vitamins A, D, E, K, and B12, choline, iron, zinc, and selenium. Throwing it away to “save calories” means saving 55 kilocalories at the cost of giving up almost all the egg's nutritional value.
Why egg protein is the benchmark
Not all proteins are utilized equally. What determines quality is the amino acid profile—whether it contains all the amino acids your body cannot make and in what proportions—and digestibility.
Eggs score highly on both counts. In fact, for decades they were used as a benchmark for comparison: eggs were assigned a biological value of 100, and all other foods were measured against them. One medium egg provides around 0.5 grams of leucine, the amino acid that triggers the signal to build muscle.
That detail explains something practical: if you eat just one egg for breakfast, you’re unlikely to activate that signal. You need about 2.5–3 grams of leucine per meal, which translates to five or six eggs. That’s why eggs work better as part of a meal than as the sole protein source. We explain it in protein for building muscle.
Raw or cooked: the difference that really matters
Here’s a fact that surprises many people. Raw egg protein is poorly digested: you absorb around half of what you consume. When cooked, you utilize almost all of it.
The reason is twofold. Heat denatures proteins, making them accessible to your digestive enzymes. It also inactivates avidin, a protein in raw egg white that sequesters biotin and prevents you from absorbing it.
In other words: adding a raw egg to a shake, that classic boxing-movie trope, is one of the worst nutritional ideas out there. You get only half the protein, block a vitamin, and take on an unnecessary microbiological risk.
| Preparation | Protein utilized | Note |
|---|---|---|
| Boiled | Practically all of it | No added fat |
| Pan-fried or scrambled | Practically all of it | Depends on the oil you use |
| Poached | Practically all of it | Creamier yolk, with no added fat |
| Fried | Practically all of it | Add 40–70 kcal from oil |
| Raw | About half | It also blocks biotin |
Overcooking it doesn’t help either: a very well-done egg doesn’t lose protein, but it does lose some of its more sensitive vitamins. The ideal point is set whites with a still-creamy yolk.
Eggs compared with other sources
To put it in perspective, here’s how it looks per 100 grams of food:
| Food (100 g) | Protein | Calories |
|---|---|---|
| Chicken breast | ≈ 23 g | ≈ 110 kcal |
| Tuna in water | ≈ 24 g | ≈ 110 kcal |
| Cooked lentils | ≈ 9 g | ≈ 115 kcal |
| Whole egg | ≈ 12.6 g | ≈ 143 kcal |
| 0% fat whipped fresh cheese | ≈ 8 g | ≈ 47 kcal |
| Whey protein powder | ≈ 80-89 g | ≈ 380 kcal |
Eggs are neither the most protein-dense nor the lightest option. Their advantage lies elsewhere: they’re inexpensive, keep for weeks, take three minutes to prepare, and their protein is among the highest-quality available. If you’re interested in comparing them with the other classic source, see how much protein chicken contains.
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View productHow many eggs can you eat per day?
For years, the answer was “one, because of cholesterol.” That recommendation has been thoroughly reassessed: the cholesterol you eat has little effect on the cholesterol in your blood, because your liver reduces its own production when more comes from outside. Current guidelines no longer set a limit on eggs for the general healthy population.
In practice, eating one or two eggs a day is perfectly reasonable as part of a varied diet, and higher intakes have not caused problems in healthy people either. What remains true is that two cases warrant a discussion with your doctor: people with type 2 diabetes and those with familial hypercholesterolemia.
How to fit them into your day
A realistic breakdown for someone who trains and aims for about 120 grams of protein per day:
- Breakfast: 3 scrambled eggs (≈ 20 g) with whole-grain bread.
- Lunch: 150 g of chicken or fish (≈ 33 g).
- Snack: Greek yogurt or a shake (≈ 20–25 g).
- Dinner: legumes with a boiled egg, or fish (≈ 30 g).
Keep something in mind: although eggs are the first food of the day, they are not the biggest source. That’s normal. Getting 120 grams solely from eggs would mean eighteen eggs, or about 1,300 kilocalories. That is their practical limit. If you want to fine-tune your daily target, you can find the complete calculation in how much protein to consume per day.
Frequently asked questions
Around 6.5 grams, for an M-size egg weighing about 58 grams with the shell. The edible portion weighs around 52 grams and provides about 72 kilocalories.
About 13 grams for medium eggs and about 15 for large ones. A three-M-egg omelet provides around 19–20 grams, which is a decent serving of protein for breakfast.
In total, the egg white, because it weighs twice as much. Per gram, the yolk, which is more concentrated. In a medium egg, the white provides about 3.6 grams compared with 2.7 grams from the yolk. The yolk also provides almost all the micronutrients.
No. Approximately half the protein in a raw egg is digested, while nearly all of the protein in a cooked egg is absorbed. In addition, raw egg white contains avidin, which blocks biotin absorption. Always cook it.
A typical 25-gram serving of protein is equivalent to about four medium eggs. The difference is in the calories: the shake contains around 110, while four eggs contain almost 290. Neither option is better; it depends on whether you have calories to spare or need more.
Not appreciably. The farming system can slightly change the fat profile and the color of the yolk, but the protein content is practically the same. What does change the amount is the size of the egg.
Dietary cholesterol has little effect on blood cholesterol for most people because the liver compensates by producing less. Current recommendations no longer limit the number of eggs for healthy people. If you have type 2 diabetes or familial hypercholesterolemia, it is best to discuss your intake individually with your doctor.
Two or three a day fit well into almost any plan, but do not try to meet your target with eggs alone: you would end up consuming a disproportionate number of calories. Use them as the basis of your breakfast and get the rest from meat, fish, dairy, legumes, and, if you struggle to reach your target, a shake.
The amount of protein absorbed is practically the same. The difference is what you add: cooking it adds nothing, while scrambling or frying adds the calories from the oil or butter. If you count calories, choose boiled or poached.
Yes. It is heat-treated, so the protein is digested well and the avidin has already been inactivated. It is a convenient way to increase your protein intake without adding fat, although you miss out on the nutrients provided by the yolk.
The essentials
A medium egg provides around 6.5 grams of protein; a large egg, around 7.5. The yolk is more concentrated than the white, so do not discard it unless you have a specific reason. And always cook it: when raw, you absorb only half.
As a source of protein, it is one of the best options in terms of quality, price, and convenience. Its only limitation is volume: at some point, you cannot eat more eggs without throwing your calorie intake off balance, and that is where the other sources come in.
If you want to go deeper, continue with what protein is for and protein powder.
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