Egg White Protein: Benefits, Protein Per Egg, and How It Compares

Egg white protein is a complete protein with a PDCAAS of 1.00, the top of the scale in the 1991 FAO/WHO report, plus all nine essential amino acids, no dairy, and almost no fat or carbs. Egg protein was the original yardstick for amino acid scoring; FAO's own glossary says "The original standard used was egg protein." The trade-off? Less leucine than whey, which means it's not the fastest muscle builder on its own. Pairing it with another complete protein is the usual fix.

Let's get into what egg white protein actually does well, where it falls short, and why it keeps showing up in clean protein formulas.

Why Is Egg White Protein Considered the Gold Standard?

Before whey protein dominated the supplement aisle, egg white was the protein, and egg protein was the reference that amino acid scores were first measured against. When FAO and WHO standardized PDCAAS in 1991, egg white scored the maximum 1.00, alongside casein; beef and soy protein isolate scored 0.92 and pea protein concentrate 0.73 (FAO/WHO, 1991).

PDCAAS caps every score at 1.00, which hides real differences between high-quality proteins. FAO's 2013 expert consultation recommended the newer DIAAS "to replace PDCAAS" because it isn't capped. By DIAAS, whole cooked egg scores 135 for adults in a 2024 study, well above FAO's example cut-off of 100 for excellent quality (Fanelli et al., 2024). Egg white on its own has almost no DIAAS data yet. The full sourced table, with whey, beef, soy, pea, rice and wheat, is further down this page.

For a broader comparison of animal versus plant protein quality, see our whey vs plant vs beef protein breakdown.

What's the Amino Acid Profile Look Like?

Egg white delivers all nine essential amino acids. The one that gets argued about is leucine, the amino acid most tied to muscle protein synthesis, and here egg sits below dairy:

Per-25 g figures are our multiplication from the percentages, except whey, which the ISSN position stand gives directly. Egg samples vary: Gorissen's egg protein measured 7.0% leucine and USDA's dried egg white works out to 8.8%.

Here's the honest part: egg white protein has less leucine per serving than whey. The ISSN recommends 700 to 3,000 mg of leucine per dose (Jäger et al., 2017). A 25 g serving of egg white protein clears that floor comfortably; it just sits below whey.

Does that make egg white protein useless for building muscle? No. It means you either use a slightly larger serving or pair it with another complete protein. Our Paleo Protein Powder pairs egg white protein with grass-fed beef protein isolate for 26 g of protein per scoop. The label doesn't list leucine, so we don't claim a leucine number for the blend.

How Much Protein Is in Egg Whites? (1 Egg, 1 Cup, Powder Serving)

The math that surprises people: you’d need to separate about eight eggs to match one scoop of egg white protein powder, which is most of the argument for the powder.

What is the best egg white protein powder?

The best egg white protein powder lists egg white first and nearly alone, is made from pasteurized egg, uses no sweetener you are trying to avoid, and delivers 20 grams or more of protein per scoop. If you want more leucine per scoop or a smoother shake, a blend of egg white with another complete protein is the other honest option.

Five checks separate a good one from a tub of foam:

• Egg white first, and nearly alone. A plain egg white powder can be a single ingredient. Flavored versions add sweetener, flavor, and sometimes gums. Each addition should have a job you want.
• Heat-treated egg. In a small tracer study, cooked egg protein was 90.9% digestible at the end of the small intestine, compared with 51.3% for raw egg protein.[4] Look for a powder made from pasteurized egg white rather than anything sold as raw.
• Protein close to the scoop weight. USDA data for dried, stabilized egg white show 84.1 grams of protein per 100 grams.[12] A plain egg white scoop that delivers far less protein than it weighs is carrying something else.
• Leucine, honestly compared. Leucine makes up roughly 7 to 9 percent of egg protein, depending on the sample, while 25 grams of whey supplies about 2.7 grams.[1][12] A 25-gram serving of egg white clears the 700-milligram leucine floor the International Society of Sports Nutrition sets per serving; it just sits below whey.[13]
• Your allergens and diet. Egg is a major allergen, and egg white is out during AIP elimination. It is naturally dairy-free and lactose-free.

Most buyers end up choosing among four formats:

We make one of the blends: PaleoPro Paleo Protein pairs egg white protein with grass-fed beef protein isolate for 26 grams of protein per 30-gram scoop, with no dairy. If you want a pure egg white product, it is not that, and a plain egg white powder is the better buy. If you are comparing dairy-free options more broadly, the non-whey protein powder guide lines up egg white against beef, pea, rice, and collagen.

Protein quality scores explain why egg white keeps turning up in these blends, and why it earned its reputation in the first place.

Egg Protein by the Numbers: USDA Values and Protein Quality Scores

Two facts get looked up about egg protein more than any others: how much protein is in egg white, and whether egg really scores 1.0 on PDCAAS. Both answers, with the primary sources, are below.

Protein in egg white and whole egg (USDA FoodData Central)

Protein quality: PDCAAS and DIAAS by source

PDCAAS is the 1991 FAO/WHO method, and it caps every score at 1.00: "Protein digestibility-corrected amino acid scores above 1.00 would be considered as 1.00 or 100%." Egg white scored the maximum 1.00 in that report's own table, alongside casein. In 2013 an FAO expert consultation recommended DIAAS "to replace PDCAAS." DIAAS isn't capped, and FAO gave example cut-offs of 100 or more for excellent or high quality and 75 to 99 for good quality, with no protein claim below about 75.

Read the DIAAS column with two cautions. The scores come from animal digestibility studies (growing pigs unless the row says rats), and they depend on which reference pattern is used; the young-child pattern gives lower numbers for the same food. And egg white itself has almost no DIAAS data: the one in-vivo value we found (145) comes from a rat study by researchers at an egg-products company. Whole cooked egg, measured in pigs, scores 135.

How we built these tables: USDA rows are FoodData Central SR Legacy entries named by FDC ID (published 2019-04-01), retrieved 2026-09-25; portion columns are our multiplication using USDA's portion weights. PDCAAS values are from Table 11 of the FAO/WHO 1991 report (Food and Nutrition Paper 51) where it lists the food; whey and rice values come from Rutherfurd et al. (2015), measured in rats. DIAAS values use the FAO 2013 reference pattern for older children, adolescents and adults unless a row says otherwise. Sources checked 2026-09-25.

Is Egg White Protein Better Than Whey?

Depends what you mean by "better." Here's the honest comparison:

Whey wins on speed. It absorbs roughly 3x faster and delivers more leucine, which means a bigger acute spike in muscle protein synthesis. If you're strictly optimizing for the fastest post-workout MPS response, whey has a measurable edge.

Egg white wins on tolerance. It's completely dairy-free: no lactose, no casein, no whey proteins. About 68% of the world's population has lactose malabsorption (NIDDK). If your protein shake makes you bloated, crampy, or gassy, that's usually the dairy. Egg white protein doesn't do that. We go deeper on this in our guide to protein powder that doesn't cause bloating.

For long-term body composition? The available research doesn't show a meaningful difference between protein sources when total daily protein is matched. A 2012 RCT gave female athletes 15g of egg white protein daily for 8 weeks, and both the egg white and control groups gained similar strength and lean mass (Hida et al., 2012). The study was underpowered, but it echoes the broader finding across protein research: consistency and total protein intake matter more than source.

What About Absorption: Does Cooking Matter?

This one is actually fascinating. A landmark study using stable isotope tracers found that cooked egg protein has 90.9% digestibility, compared to just 51.3% for raw egg protein (Evenepoel et al., 1998). Heat nearly doubles how much protein your body actually absorbs.

Why? Raw egg white contains avidin, a protein that binds biotin (vitamin B7) with one of the strongest non-covalent bonds in nature. It also contains ovomucoid, a trypsin inhibitor that reduces protein digestion. Both are deactivated by heat: avidin denatures above 70C, and ovomucoid loses most of its inhibitory activity at cooking temperatures.

The practical implication: egg white protein powder is pasteurized during manufacturing. It gets the ~91% digestibility rate, not the 51% rate. You're getting cooked-egg bioavailability in powder form.

The slower absorption rate (~2.8 g/hr versus whey's ~8-10 g/hr) isn't a flaw so much as a different profile: egg white releases its amino acids over a longer stretch than whey does.

What Diets Is Egg White Protein Compatible With?

The AIP exclusion deserves an explanation. The Autoimmune Protocol removes eggs because egg white contains lysozyme, a protein that can cross the intestinal barrier and enter systemic circulation, even in healthy people. In individuals with autoimmune conditions and potentially compromised gut barriers, this may trigger immune responses. If you're on AIP, choose an egg-free protein during elimination. Paleo Protein Powder contains egg white, so it is not AIP-compliant.

What About Egg Allergies?

Egg allergy affects roughly 1-2% of children and about 0.1% of adults. The primary culprit is ovomucoid, a heat-stable protein that survives cooking, which is why some egg-allergic individuals react even to baked goods (Caubet & Wang, 2011).

The good news: most children outgrow it. About 37% by age 10, 68% by age 16. And 89% of egg-allergic children can tolerate baked egg in a wheat matrix (like a muffin), which actually helps accelerate allergy resolution.

If you have a confirmed egg allergy, egg white protein powder is not for you. Beef protein isolate and bone broth collagen are egg-free alternatives. If you've outgrown a childhood egg allergy, protein powder is heat-processed, but confirm with your allergist before adding it.

Beyond the Basics: What's Actually in Egg White?

Egg white isn't just generic protein. It contains several bioactive proteins with specific functions:

The ovotransferrin finding is particularly interesting. Researchers have identified three peptides from egg white ovotransferrin (IRW, IQW, LKP) that reduced blood pressure by 10-40 mmHg in hypertensive rat models (Liao et al., 2018). Human clinical trials are currently underway but haven't published results yet. We're not going to claim egg white protein lowers blood pressure; the evidence isn't there for humans yet. But it's worth watching.

Egg white protein earned its reputation as the gold standard for a reason. A PDCAAS of 1.00. Complete amino acids. No dairy, almost no carbs. Its one limitation, lower leucine, is why PaleoPro pairs it with grass-fed beef protein isolate: a short ingredient list and two complete protein sources in one scoop. PaleoPro Paleo Protein Powder is how it's done. Browse the full protein collection.

Frequently Asked Questions

Is egg white protein a complete protein?

Yes. Egg white contains all nine essential amino acids with no limiting amino acid. It scores the maximum 1.00 on PDCAAS in the FAO/WHO 1991 report, and whole cooked egg scores 135 on DIAAS in a 2024 study, above FAO's example cut-off of 100 for excellent quality. It has less leucine per serving than whey or beef protein, but it's nutritionally complete. For context on what "complete protein" means, see our guide to whether beef protein is a complete protein.

How much egg white protein should I take per day?

Most research uses 20-40g of protein per serving for muscle protein synthesis, depending on body weight. Because egg white is lower in leucine, aiming for the higher end (~30-40g) per dose or combining it with a leucine-rich protein like beef isolate is a practical strategy. PaleoPro Paleo Protein delivers 26g per serving by combining both.

How many calories and how much protein are in egg whites?

USDA FoodData Central lists raw egg white at 52 calories and 10.9 g of protein per 100 g, with 0.17 g of fat and 0.73 g of carbohydrate (FDC 172183). One large egg white (33 g) carries about 3.6 g of protein. Dried egg white powder is far more concentrated: 84.1 g of protein per 100 g (FDC 170895).

Can I bake with egg white protein powder?

Absolutely. Egg white protein is arguably the best protein powder for baking because of ovalbumin's natural foaming and gelling properties, the same reason egg whites make meringue. It provides structure in muffins, pancakes, and bars without the gummy texture some protein powders create. Check our high-protein muffin recipes for ideas.

Is egg white protein powder safe if I'm lactose intolerant?

Yes. Egg white protein contains zero dairy: no lactose, no casein, no whey. It's a completely separate food category from milk-derived proteins. If dairy is causing your digestive issues, switching to egg white protein (or a beef + egg white blend like PaleoPro) eliminates the problem entirely.

Why does PaleoPro combine egg white with beef protein?

Because two complete animal proteins cover more ground than one, without any dairy. Egg white brings a PDCAAS of 1.00 and a neutral taste; grass-fed beef protein isolate is a second complete protein from a different source. Together they make a dairy-free scoop with 26 g of protein. The label doesn't state leucine, so we don't claim the blend hits a particular leucine threshold.

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