Egg
Eggs are nutrient-dense animal foods containing high-quality protein, choline, and micronutrients. They are widely consumed and generally well-tolerated, though a small percentage of people have allergic or sensitivity responses.
Also known as: hen egg, chicken egg, egg white, egg yolk, albumen
Scientific & Editorial Standard: This information is synthesized from peer-reviewed databases (such as PubMed, NIH, NHS, and Mayo Clinic) and validated using multi-model cross-referencing by the Plateify Editorial Team. It is intended for educational purposes and is not medical advice. If you suspect food sensitivities, consult a healthcare provider.
An egg is the ovum of a hen, consisting of the white (albumen) and yolk, enclosed in a shell. Eggs are produced commercially by laying hens and are among the most commonly consumed protein sources globally. They appear in countless culinary applications—fried, boiled, baked into cakes and breads, and incorporated into sauces, custards, and prepared foods.
Eggs contain approximately 6–7 grams of protein per large egg (50 g), along with all nine essential amino acids, making them a complete protein source. One large egg provides approximately 147 mg of choline (primarily in the yolk), lutein, zeaxanthin, and selenium. Egg white is primarily protein (3.6 g) and water with minimal fat; the yolk contains most of the micronutrients and fat. Eggs are readily digested, and the protein and fat content supports satiety. The bioavailability of egg protein is high, and egg consumption does not typically affect gastric pH or cause functional gut disturbance in non-allergic individuals.
Blood Lipids and Cardiovascular Health
Eggs have long been studied in relation to blood cholesterol. A large egg contains approximately 186 mg of dietary cholesterol, primarily in the yolk. Evidence from prospective cohort studies and randomized controlled trials indicates that dietary cholesterol from eggs has minimal direct impact on blood LDL cholesterol in most people, because hepatic cholesterol synthesis is downregulated when dietary intake rises. Habitual egg consumption (up to one egg daily) is not associated with increased cardiovascular risk in observational data; some studies report neutral or modestly favorable associations with HDL cholesterol. Individual responses vary, particularly among people with familial hypercholesterolemia or metabolic conditions affecting lipid handling.
Allergy and Intolerance
Egg allergy is one of the most common food allergies in children, though prevalence declines substantially with age; studies estimate egg allergy affects approximately 0.5% or fewer adults. IgE-mediated allergic reactions to eggs are triggered by proteins in the white or yolk and range from mild (oral itching, urticaria) to severe (anaphylaxis). Egg allergy differs from egg intolerance, which causes gastrointestinal symptoms without immune involvement. People with confirmed egg allergy must avoid eggs and egg-containing products; those with intolerance may tolerate eggs in cooked or processed forms in which proteins are partially denatured. Testing (skin prick test, specific IgE) and supervised oral challenge are used for diagnosis.
Frequently Asked Questions
Do eggs raise cholesterol?
Eggs contain dietary cholesterol, but they do not significantly raise blood LDL cholesterol in most people because the body reduces its own cholesterol production when dietary intake is higher. Habitual consumption of one egg per day is not associated with increased cardiovascular risk in most individuals.
How common is egg allergy in adults?
Egg allergy is far more common in children than adults. Studies estimate that approximately 0.5% or fewer adults have a true egg allergy, as many children outgrow it. True egg allergy involves IgE-mediated immune responses and requires strict avoidance; diagnosis is confirmed by clinical history, skin testing, or specific IgE measurement.
What nutrients are in eggs?
One large egg contains approximately 6–7 g of protein, along with choline, selenium, lutein, zeaxanthin, and B vitamins. Egg white is mostly protein and water; the yolk contains most micronutrients, fat, and fat-soluble compounds.
Are eggs difficult to digest?
Eggs are readily digested in most people and do not cause functional gastrointestinal disturbance. Their protein and fat content promote satiety. Exceptions include people with egg allergy or intolerance, who may experience digestive symptoms.
Sources
- Egg Allergy — Mayo Clinic
- Eggs and Heart Disease — Harvard School of Public Health Nutrition Source
- Choline Fact Sheet for Consumers — NIH Office of Dietary Supplements
- Food Allergen Labeling and Consumer Protection Act (FALCPA) — FDA
- Egg Nutritional Data — USDA FoodData Central
Educational content: This page is for general informational purposes only. Individual responses to foods vary widely. If you suspect a food allergy or sensitivity, consult a licensed dietitian, allergist, or physician before making dietary changes. Full disclaimer
Some content on this site is AI-assisted. While we strive for accuracy, information may not reflect the latest research. Always verify health information with a professional.
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