Chicken Egg Protein – Composition and Properties

Nutritional science strongly discourages the consumption of raw eggs due to their substantial digestive burden on the human gastrointestinal tract. A critical concern is the presence of avidin, an active glycoprotein that irreversibly sequesters biotin (vitamin H), rendering it biologically unavailable for absorption. While this binding mechanism serves as an evolutionary defense against microbial colonization within the egg, it poses a significant risk of biotin deficiency in humans—particularly among individuals with compromised gut microbiota or preexisting malabsorption disorders. Clinical manifestations may include dermatological lesions, inflammatory bowel conditions, and persistent malaise. An additional hazard arises from potential *Salmonella* contamination, a zoonotic pathogen endemic to poultry that induces acute gastroenteritis in humans, characterized by profuse diarrhea, emesis, and abdominal cramping. The resultant fluid loss creates a heightened risk of dehydration, with severe outcomes more probable during summer months and in vulnerable populations (pediatric patients, geriatric individuals, and immunocompromised persons). Conversely, thermal processing (boiling, frying) effectively neutralizes avidin’s biotin-binding capacity through protein denaturation while preserving digestibility, nutritional integrity, and organoleptic properties of the egg.

Beyond their fundamental nutritional value, specific protein fractions found in eggs exhibit significant bioactive properties that exert beneficial effects on the human body across multiple physiological levels. Among the most well-documented compounds with such functions are lysozyme — an enzyme renowned for its potent antibacterial activity — as well as conalbumin, cystatin, and sialic acid, all of which demonstrate the capacity to inhibit viral and bacterial proliferation. From an evolutionary perspective, these components were "engineered" by nature to safeguard developing embryos against microbial spoilage; however, their therapeutic potential can also be harnessed by humans, particularly when consuming eggs in minimally processed forms, such as soft-boiled eggs. Furthermore, these substances are now isolated from eggs on an industrial scale and serve as valuable raw materials in the synthesis of pharmaceuticals with a broad range of applications.

Egg-derived protein powder concentrate serves as a versatile ingredient across multiple industries, including confectionery, bakery, pastry production, and pharmaceutical manufacturing. It functions as a high-quality substitute for fresh egg white, offering enhanced microbial stability and an extended shelf life. This powdered form is routinely incorporated into formulations for sponge cakes, biscuits, instant dessert creams, long-life sauces, and pre-prepared delicatessen products. Furthermore, due to its exceptionally high complete protein content (approximately 82% by composition), it represents a critical dietary supplement for athletes seeking to increase lean muscle mass. The product delivers an energy value of 370 kcal per 100 grams, with a macronutrient profile comprising 82% protein, 8.5% water, roughly 5% carbohydrates, and trace minerals accounting for the remainder. A defining characteristic is its complete absence of fat, which consequently eliminates cholesterol content. The production process for 1 kilogram of powder requires the processing of approximately 250 chicken egg whites, ensuring the preservation of the original nutrient density of the raw material.