Question

Define food intolerance and how it differs from a food allergy.

Hint:

Remember: Food allergy involves the immune system and can be dangerous, while food intolerance mainly affects digestion.

Answer 1

Concept: Food-related adverse reactions are mainly classified into food intolerance and food allergy. Though both involve unpleasant reactions to certain foods, they differ in causes, symptoms, and severity.
Step 1: Definition of Food Intolerance.
Food intolerance is a non-immunological reaction that occurs when the body is unable to properly digest or process a particular food. It is usually caused by the absence of certain enzymes or sensitivity to food components. For example, lactose intolerance occurs due to the lack of the enzyme lactase.
Step 2: Definition of Food Allergy.
Food allergy is an immune system reaction that occurs when the body mistakenly identifies a certain food as harmful. The immune system releases chemicals such as histamine, leading to symptoms that can range from mild to severe.
Step 3: Differences between Food Intolerance and Food Allergy.

• Cause: Intolerance is due to digestive issues; allergy involves the immune system.
• Severity: Intolerance is usually mild; allergy can be severe and life-threatening.
• Symptoms: Intolerance causes bloating, gas, or stomach pain; allergy may cause rashes, swelling, breathing difficulty, or anaphylaxis.
• Quantity: Small amounts of food may trigger an allergy, while intolerance often depends on the quantity consumed.

Final Answer: Food intolerance is a digestive problem where the body cannot properly process certain foods, whereas a food allergy is an immune system reaction to specific foods. Allergies are generally more serious and can be life-threatening, while intolerances are usually less severe and limited to digestive discomfort.