# Chicken Egg White Protein (Gallus gallus domesticus)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/chicken-egg-white-protein
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-25
**Evidence Score:** 2 / 10
**Category:** Protein
**Also Known As:** Gallus gallus domesticus albumen, Egg white protein, EWP, Ovalbumin protein, Egg albumen powder, Chicken albumen protein, Ovum albumin

## Overview

Chicken egg white protein (Gallus gallus domesticus) is a complete protein comprising multiple bioactive fractions, most notably ovotransferrin (12%) and lysozyme (3.5%), which exhibit iron-chelating and [antimicrobial](/ingredients/condition/immune-support) activity respectively. Its high biological value and broad amino acid profile make it a practical protein source for supplementation, though clinical evidence for therapeutic health claims remains absent.

## Health Benefits

• No clinical health benefits documented - the research dossier contains no human clinical trials or RCTs
• Potential iron-binding properties through ovotransferrin component (12% of total protein), though no human studies available
• Contains lysozyme (3.5%), an enzyme with [antimicrobial](/ingredients/condition/immune-support) properties in vitro, but no clinical evidence provided
• High-quality protein source with complete amino acid profile based on composition, though no supplement-specific studies exist
• May support muscle protein synthesis as a dietary protein, but no clinical trials as a biomedical supplement are reported

## Mechanism of Action

Ovotransferrin binds ferric iron (Fe³⁺) via two homologous lobes, sequestering it from pathogens and potentially modulating iron bioavailability in the gut. Lysozyme hydrolyzes β-1,4-glycosidic bonds in peptidoglycan, disrupting bacterial cell walls and conferring [antimicrobial](/ingredients/condition/immune-support) activity. Ovalbumin, comprising roughly 54% of total egg white protein, contributes branched-chain amino acids that stimulate mTORC1 signaling to support muscle protein synthesis.

## Clinical Summary

No published randomized controlled trials or human clinical studies have specifically examined chicken egg white protein isolate as a supplement for therapeutic health outcomes. General egg white protein research is largely limited to in vitro studies and animal models demonstrating ovotransferrin's iron-binding capacity and lysozyme's [antimicrobial](/ingredients/condition/immune-support) efficacy, neither of which has been confirmed with quantified outcomes in human trials. Comparator studies on protein quality assign egg white a biological value of approximately 88 and a PDCAAS near 1.0, supporting its nutritional completeness but not therapeutic claims. The current evidence base is insufficient to support any specific health benefit dosage recommendations.

## Nutritional Profile

Chicken egg white protein is a high-quality, nearly pure protein source (~81-85% protein by dry weight, ~11g protein per 100g fresh egg white) with very low fat (<0.1g/100g) and low carbohydrate content (~0.7g/100g, primarily glucose). It is a complete protein containing all nine essential amino acids: leucine (~8.8g/100g protein), lysine (~7.2g/100g protein), valine (~7.3g/100g protein), isoleucine (~6.6g/100g protein), threonine (~4.5g/100g protein), methionine (~3.2g/100g protein), phenylalanine (~6.5g/100g protein), tryptophan (~1.7g/100g protein), and histidine (~2.4g/100g protein). The PDCAAS (Protein Digestibility Corrected Amino Acid Score) is approximately 1.0, indicating excellent protein quality. Key bioactive protein fractions include: ovalbumin (~54% of total protein, primary storage protein), ovotransferrin/conalbumin (~12%, iron-binding glycoprotein capable of chelating ferric iron in a 1:2 protein-to-iron molar ratio), ovomucoid (~11%, serine protease inhibitor), lysozyme (~3.5%, muramidase enzyme cleaving bacterial cell wall peptidoglycans), ovomucin (~1.5-3.5%, high-molecular-weight glycoprotein), and avidin (~0.05%, biotin-binding protein - note: raw egg white consumption can induce biotin deficiency due to avidin-biotin binding, inactivated upon cooking). Micronutrient content per 100g fresh egg white includes riboflavin/B2 (~0.43mg, ~33% DV), selenium (~20mcg, ~36% DV), magnesium (~11mg, ~3% DV), potassium (~163mg, ~3% DV), and sodium (~166mg, ~7% DV). Calcium content is modest (~7mg/100g). Notable absence of fat-soluble vitamins (A, D, E, K) and minimal iron content despite ovotransferrin presence. Bioavailability is significantly affected by preparation: cooked egg white protein demonstrates ~91% digestibility versus ~51-65% for raw egg white, attributed to denaturation of protease inhibitors (ovomucoid) and structural protein unfolding upon heating. No dietary fiber present.

## Dosage & Preparation

No clinically studied dosage ranges, forms, or standardization details are reported in the available research. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Egg white protein is contraindicated in individuals with IgE-mediated egg allergies, which affect an estimated 1.3% of children and a smaller proportion of adults, with ovalbumin and ovomucoid identified as the primary allergenic proteins. Raw egg white contains avidin, a glycoprotein that binds biotin with extremely high affinity (Kd ~10⁻¹⁵ M) and can cause biotin deficiency if consumed chronically, though commercial processing and heat treatment denature avidin and eliminate this risk. No clinically significant drug interactions have been formally documented for egg white protein supplements, though iron-chelating activity of ovotransferrin could theoretically interfere with oral iron supplementation if taken simultaneously. Pregnant and breastfeeding individuals should ensure product is from pasteurized sources to avoid Salmonella contamination risk.

## Scientific Research

The research dossier explicitly states that no human clinical trials, RCTs, or meta-analyses on chicken egg white protein as a biomedical supplement were found. No PubMed PMIDs are available for such studies.

## Historical & Cultural Context

The research dossier provides no information on historical or traditional medicinal uses of chicken egg white protein in any traditional medicine systems.

## Synergistic Combinations

Insufficient research data to recommend synergistic combinations

## Frequently Asked Questions

### What is the difference between egg white protein and whey protein?

Egg white protein is lactose-free and derived from Gallus gallus domesticus albumen, while whey is a dairy byproduct. Both are complete proteins with PDCAAS scores near 1.0, but whey protein isolate typically contains a higher leucine concentration (~11%) compared to egg white protein (~8.5%), which may confer a modest advantage for acute muscle protein synthesis signaling via mTORC1.

### Does egg white protein contain avidin, which blocks biotin absorption?

Raw egg whites contain avidin, a glycoprotein that binds biotin with extraordinary affinity and can induce biotin deficiency when consumed in large quantities over time. However, commercially produced egg white protein supplements undergo heat processing that denatures avidin, rendering it unable to bind biotin, so this risk is not applicable to standard pasteurized egg white protein powders.

### How much lysozyme is in egg white protein and what does it do?

Lysozyme comprises approximately 3.5% of total egg white protein by weight and functions as a glycoside hydrolase, cleaving β-1,4-glycosidic bonds in bacterial peptidoglycan cell walls. This mechanism has demonstrated antimicrobial activity in vitro against gram-positive bacteria, though no human clinical trials have established an effective oral dosage for therapeutic antimicrobial use from egg white protein supplementation.

### Is chicken egg white protein safe for people with egg allergies?

No — chicken egg white protein is contraindicated for individuals with IgE-mediated egg allergies. The primary allergenic proteins are ovalbumin (54% of egg white) and ovomucoid (11%), which can trigger reactions ranging from urticaria to anaphylaxis even in processed supplement forms. Individuals with diagnosed egg allergies should avoid this ingredient entirely and consult an allergist before trialing any egg-derived supplement.

### What amino acids are in egg white protein and is it a complete protein?

Chicken egg white protein is a complete protein containing all nine essential amino acids, with particularly notable concentrations of leucine (~8.5%), glutamic acid (~14%), and arginine (~6.4%) by amino acid profile. It achieves a Protein Digestibility Corrected Amino Acid Score (PDCAAS) near 1.0 and a biological value of approximately 88, making it one of the more bioavailable whole food-derived protein sources available in supplement form.

### What is the bioavailability of egg white protein compared to whole egg protein?

Egg white protein has excellent bioavailability with a biological value (BV) of 88, though whole egg protein (BV ~100) is marginally superior due to the added fat and micronutrients in the yolk. The difference is minimal for most users, and egg white protein is preferred by those seeking a lean protein source without dietary fat. Absorption rates are rapid for both forms, with peak amino acid levels occurring within 1-2 hours of consumption.

### How does ovotransferrin in egg white protein affect mineral absorption?

Egg white protein contains ovotransferrin (approximately 12% of total protein), an iron-binding protein that theoretically could affect iron bioavailability; however, no human clinical studies have documented whether this component impairs dietary iron absorption in practice. While ovotransferrin exhibits iron-binding properties in vitro, the practical significance for supplementation users remains unknown. Individuals concerned about iron status should space egg white protein consumption away from iron supplements or iron-rich meals as a precautionary measure.

### Is egg white protein suitable for vegetarians, and does it differ nutritionally from plant-based protein powders?

Egg white protein is suitable for vegetarians (though not vegans) and contains all nine essential amino acids in optimal ratios, making it a complete protein—an advantage many plant-based proteins lack without fortification or blending. Plant-based proteins often require higher serving sizes to match the amino acid density of egg white protein and may have lower digestibility scores. The choice between egg white and plant proteins often depends on dietary philosophy, allergen concerns, and individual digestive tolerance rather than nutritional completeness alone.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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