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Food Allergies vs Food Intolerance: Key Differences

Reviewed by medical AI · Updated: March 29, 2026

Understanding true food allergies, food intolerances, and how to manage both safely.

In this article

  1. 1.Overview
  2. 2.Common Causes
  3. 3.Related Symptoms
  4. 4.Related Conditions
  5. 5.Frequently Asked Questions
  6. 6.Related Articles

vHospital · Health Education

Food allergies involve an immune system reaction and can be life-threatening. Food intolerances are digestive responses that cause discomfort but are not immune-mediated. The distinction is critical for management.

The most common allergens include peanuts, tree nuts, milk, eggs, wheat, soy, fish, and shellfish. Reactions range from mild hives to severe anaphylaxis.

See also: Iron-Rich Foods and Supplementation: Complete Guide

Diagnosis uses medical history, skin prick testing, specific IgE blood tests, and oral food challenges. Confirmed allergy requires strict avoidance and epinephrine auto-injectors.

Oral immunotherapy is now available for peanut, milk, and egg allergies and can significantly increase tolerance threshold.

See also: Living with Severe Allergies: Safety and Treatment

Common Causes

  • Infections and inflammation — bacterial, viral, or autoimmune triggers activate abdominal pain
  • Metabolic disturbances — hormonal imbalances, nutrient deficiencies, or blood sugar changes
  • Structural or vascular causes — tissue damage, nerve compression, or circulatory problems
  • Psychological factors — stress, anxiety, and depression can produce measurable physical abdominal pain
  • Underlying conditions such as Gastritis, Peptic Ulcer, Colitis frequently present with abdominal pain as a core feature

Frequently Asked Questions

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Medically ReviewedvHospital Editorial Team · 2024–2025
Sources:WHOPubMedUpToDateNICECDC

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⚠️ This content is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.