A food allergy and a food intolerance are not the same thing — they involve different parts of the immune system and cause very different reactions.
Food Allergy
• Involves the immune system producing IgE antibodies.
• Reactions are usually immediate (within minutes to 2 hours).
• Symptoms can include hives, swelling, difficulty breathing, or even anaphylaxis - a potentially life-threatening reaction.
• Food allergies are less common but more serious and require medical diagnosis and management.
Food Intolerance
• Often linked to the immune system producing IgG antibodies.
• Reactions are typically delayed (hours or even days after eating).
• Symptoms are less severe but can still affect quality of life - such as bloating, fatigue, headaches, skin issues, or digestive discomfort.
• Food intolerances are more common and can often be managed by adjusting your diet.
In summary:
• Food allergies (IgE) are immediate and can be dangerous.
• Food intolerances (IgG) are delayed and less severe, but can still impact your health and well-being.
If you suspect a food allergy, it’s important to speak with a healthcare professional immediately. Intolerance tests, on the other hand, can help identify foods that may be contributing to ongoing symptoms and guide dietary changes.
Accurate IgE testing at an ISO-accredited UK laboratory
Fast results within 3 working days
Finger prick blood sample
Free shipping & sample returns
Easy home testing
Life-changing, personalised 1:1 virtual consultation with a Nutritional Therapist
