TL;DR
- A large egg contains about 6g of protein — roughly 3.6g in the white and 2.7g in the yolk — plus 5g fat, ~72 calories, and meaningful choline, B12, selenium, and vitamin D.
- Size matters: small ~4.8g, medium ~5.5g, large ~6g, extra-large ~6.7g, jumbo ~7.5g.
- Egg protein is the reference standard for protein quality — biological value of 100, complete amino acid profile, and over 90% digestibility when cooked.
- Useful anchor: 3 large eggs = ~18g protein, roughly three-quarters of a 25g whey scoop.
- The cholesterol fear has been substantially revised. Most healthy adults handle 1-3 eggs daily fine, and the yolk carries most of the micronutrients — don't bin it by default.
The short answer: a large egg has about 6g of protein, split roughly 3.6g white and 2.7g yolk. The more useful answers are how that scales with egg size, why egg protein is unusually high quality, how eggs stack up against other protein sources, and what the cholesterol research actually says now. Eggs are among the most nutrient-dense and affordable whole foods available, and the decades-old advice to limit them has been meaningfully walked back.
Protein by egg size
| Size | Weight | Protein | White | Yolk | Fat | Calories |
|---|---|---|---|---|---|---|
| Small | ~38g | ~4.8g | ~2.9g | ~1.9g | ~3.6g | ~54 |
| Medium | ~44g | ~5.5g | ~3.3g | ~2.2g | ~4.4g | ~63 |
| Large | ~50g | ~6.0g | ~3.6g | ~2.7g | ~5.0g | ~72 |
| Extra-large | ~56g | ~6.7g | ~4.0g | ~3.0g | ~5.6g | ~80 |
| Jumbo | ~63g | ~7.5g | ~4.5g | ~3.4g | ~6.3g | ~90 |
"Large" is the USDA reference size and the default for nutrition labels and recipes. Real eggs vary a little either side of these figures — close enough that it doesn't affect meal planning.
White only vs yolk only (large egg)
White: ~3.6g protein, 17 cal · Yolk: ~2.7g protein, 55 calThe white is essentially pure protein — no fat, negligible carbs, 17 calories. Useful when you're managing total fat or calories tightly, or for specific recipes.
The yolk carries the fat, the cholesterol (~185mg), and nearly all the micronutrients — choline, vitamin D, B12, selenium, lutein, and zeaxanthin. Discarding yolks by reflex throws away most of what makes an egg nutritionally interesting.
Why egg protein is unusually high quality
Biological value: whole egg is the reference standard at 100 — the benchmark other proteins are scored against. Whey scores slightly higher (~104); milk ~91, beef ~80, chicken ~79, soy ~74.
Complete amino acid profile: all nine essential amino acids in ratios closely matching human requirements. Most plant proteins are limited in at least one.
Digestibility: over 90% of cooked egg protein is absorbed and used.
Leucine: roughly 0.5g per large egg. Since about 2.5-3g of leucine per meal maximally triggers muscle protein synthesis, a single egg falls well short — which is why eggs work best in threes and fours, or paired with another protein source. More in our leucine and muscle growth guide.
The practical implication: 6g of protein from an egg does more nutritional work than 6g from many other sources.
How eggs compare
| Source | Serving | Protein | Calories | Notes |
|---|---|---|---|---|
| Eggs | 3 large | ~18g | ~215 | Complete protein + micronutrients |
| Whey isolate | 1 scoop | ~25g | ~110 | Fastest digesting, most protein per calorie |
| Chicken breast | 4oz cooked | ~30g | ~180 | Leaner than eggs |
| Salmon | 4oz cooked | ~25g | ~180 | Adds omega-3s |
| Lean beef (90/10) | 3oz cooked | ~22g | ~180 | Iron, zinc, B12, creatine |
| Greek yogurt (0%) | 1 cup | ~17g | ~100 | More protein per calorie |
| Cottage cheese | 1/2 cup | ~13g | ~90 | Slow-digesting casein |
| Firm tofu | 4oz | ~10g | ~80 | Plant-based option |
| Almonds | 3oz | ~18g | ~490 | Same protein, far more calories |
Eggs aren't the most protein-dense option per calorie — Greek yogurt, chicken breast, and whey all beat them there. What eggs win on is the combination: complete high-BV protein, substantial micronutrients, low cost, and almost no preparation skill required. For a fuller comparison of whey specifically, see best grass-fed whey protein.
The cholesterol question
For decades the logic ran: eggs contain cholesterol, blood cholesterol raises cardiovascular risk, therefore limit eggs. Current evidence complicates each step.
1. Dietary cholesterol has a smaller effect on blood cholesterol than assumed. Most circulating cholesterol is produced endogenously. Roughly a quarter of people are "hyper-responders" who do show meaningful blood changes from dietary intake; most don't.
2. The 2015-2020 Dietary Guidelines for Americans dropped the specific 300mg daily cholesterol cap that had stood for decades, based on updated evidence review.
3. Saturated and trans fats appear more important for cardiovascular risk than dietary cholesterol. Eggs themselves aren't high in saturated fat — though eggs fried in butter alongside bacon are a different meal.
4. Population studies are mixed rather than damning. Meta-analyses of moderate egg consumption in healthy populations have generally not found elevated cardiovascular risk. Some studies in diabetic populations have found associations, which is why the caveat below matters.
The reasonable position: most healthy adults can eat 1-3 eggs daily without meaningful cardiovascular concern, and the yolk's nutrition is worth keeping.
People with diabetes, familial hypercholesterolemia, or established cardiovascular disease should set egg intake with their physician rather than from general guidance — the evidence in these groups is less settled and, in the case of diabetes, some studies have found associations that don't appear in healthy populations.
If you have a strong family history of high cholesterol, get a lipid panel rather than guessing. Test, don't assume — in either direction.
Beyond protein — what else is in there
Choline (~147mg, ~27% DV): essential for brain function, liver health, and cell membranes. Most people fall short of daily needs, and eggs are one of the best food sources — particularly relevant in pregnancy for fetal brain development.
Vitamin B12 (~0.6mcg, ~25% DV): red blood cell formation and neurological function.
Selenium (~15mcg, ~27% DV): thyroid function and antioxidant systems.
Vitamin D (~41 IU, ~5% DV): modest, but eggs are one of few natural food sources. Pasture-raised eggs typically test higher.
Riboflavin, B5, folate, vitamin A, iron: meaningful contributions across the board.
Lutein and zeaxanthin: yolk-concentrated antioxidants associated with eye health.
Fat (~5g): mostly mono- and polyunsaturated, with some saturated. Pasture-raised eggs carry more omega-3.
How many eggs per day?
Most healthy adults
1-3 daily fits comfortably in a healthy diet. High-quality protein, real micronutrient density, low cost.
Active adults building protein intake
2-4 daily as part of a 1.6-2.2g/kg target, alongside other sources. Eggs contribute well without dominating the diet.
Dieting
Eggs are excellent here — research consistently shows egg-based breakfasts produce greater satiety than equivalent-calorie carbohydrate breakfasts. 2-3 daily is a sensible anchor.
High-protein and high-volume training
4-8 daily isn't unusual for someone targeting 2.0-2.4g/kg, and is far cheaper than getting the same protein from supplements. At that level it's worth keeping an eye on total dietary fat and overall balance.
Do egg quality tiers matter?
| Tier | Nutritional difference | Worth paying for? |
|---|---|---|
| Conventional | Baseline — all the core benefits | Perfectly good protein source |
| Cage-free | Marginal | Mainly a welfare choice |
| Free-range | Slightly higher omega-3 and vitamins in some studies | Modest gain, modest premium |
| Pasture-raised | Notably higher omega-3, vitamin D, vitamin E, antioxidants | The clearest nutritional upgrade |
| Organic | Modest; feed and welfare standards | Matters more for those reasons than nutrition |
| Omega-3 enriched | Substantially higher omega-3 | Useful if that's the specific goal |
Honest summary: the nutritional gap between conventional and pasture-raised is real but modest, and conventional eggs remain an excellent protein source. If budget is the constraint, buy conventional eggs and don't feel you're compromising on protein.
Common questions
Is 6g of protein per egg a lot?
Modest per item, excellent for the size, cost, and quality. Three eggs at ~18g approaches a full protein feeding for most adults.
Does cooking reduce egg protein?
No — and cooking substantially improves it. Cooked egg protein is over 90% digestible versus roughly half that raw. The raw-eggs-in-a-glass approach is less effective, not more.
Should I eat only egg whites?
Usually no. Whole eggs deliver considerably more nutrition for a modest calorie increase, and the whites-only habit descends from cholesterol advice that's since been revised. Whites-only makes sense if you're eating a lot of eggs and managing total fat, or for particular recipes.
Are eggs better than whey for building muscle?
Different jobs. Eggs are whole-food protein with micronutrients and slower digestion; whey is faster, higher protein per calorie, and more convenient post-training. Most people use both — eggs at meals, whey where speed or convenience matters. For how whey is produced, see how is protein powder made.
Why do protein figures vary between sources?
Egg size variation, analysis methodology, and individual hen differences. Real large eggs run about 5.5-6.5g. The variation is too small to matter practically.
Raw and undercooked eggs carry a salmonella risk, which is why cooking is recommended — and, conveniently, also doubles protein digestibility. If you want eggs in a smoothie, use pasteurized eggs or liquid pasteurized egg whites rather than cracking raw shell eggs in.
The risk is higher for young children, older adults, pregnant women, and anyone immunocompromised. Those groups should avoid raw or runny eggs entirely.
Practical egg meals by protein
~24g — Breakfast scramble
3 eggs (~18g) plus cheese (~6g), with vegetables. Add toast or oats for carbs.
~29g — Hard-boiled eggs and Greek yogurt
2 eggs (~12g) plus a cup of Greek yogurt (~17g). Transportable, no cooking on the day.
~27g — Greek-style egg salad
3 hard-boiled eggs (~18g), Greek yogurt in place of mayo (~3g), on whole wheat (~6g).
~18g plus carbs — Post-workout plate
3 eggs with a sweet potato and vegetables. Slower than a shake, more complete as a meal.
~4-6g each — Egg muffins
4-6 eggs baked across 6 muffin cups. The meal-prep standby for busy mornings.
The Bottom Line
A large egg has about 6g of protein — ~3.6g white, ~2.7g yolk — plus 5g fat, ~72 calories, and real choline, B12, and selenium. Scale up or down by size: small ~4.8g to jumbo ~7.5g.
Quality is the headline. Biological value of 100 is the reference standard, the amino acid profile is complete, and cooked egg protein is over 90% digestible.
Keep the yolk. It holds nearly all the micronutrients, and the cholesterol advice that created the whites-only habit has been substantially revised.
1-3 daily suits most healthy adults; 2-4 for active adults; 4-8 isn't unusual on a high-protein diet. Diabetes, familial hypercholesterolemia, or existing cardiovascular disease means setting the number with your doctor instead.
Cook them. Doubles digestibility and removes the salmonella risk. Pasteurized eggs for smoothies.
Dig deeper: leucine and muscle growth · best grass-fed whey protein · how is protein powder made · protein for marathon runners · protein for triathletes
