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Food_Allergies___Intolerances._09

Food_Allergies___Intolerances._09 - FS 150 Food Allergens...

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FS 150 FS 150 Food Allergens Food Allergens & & Intolerances Intolerances NN, Unit 17 NN, Unit 17
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Public Perception Public Perception Many people think that they are allergic to foods, but they confuse: metabolic food disorders and other non-immunological reactions to foods with true food allergy !
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What is a Food Allergy? What is a Food Allergy? A food allergy is an immune system response to a protein in a food that the body mistakenly believes is harmful If the immune system is not involved, it is not a true food allergy
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What is Food Intolerance? What is Food Intolerance? An adverse reaction to a normally harmless substance in food that does NOT involve the body’s immune system
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Immunoglobulin E Immunoglobulin E One of five classes of immunoglobulins (antibodies) made by the body to protect the host against invading allergens Plays a key role in food allergies
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Adverse Reactions to Foods Adverse Reactions Immunological (Hypersensitives) Non-Immunological (Intolerances) Microbial IgE Mediated Non-IgE Mediated Food Allergy Celiac Disease Toxicological Example: Scombroid Poisoning Metabolic Example: Lactose Intolerance Infections Example: Salmonellosis Toxins Example: Staphylococcal enterotoxins FDA
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Food Intolerances Food Intolerances Do not involve the immune system Metabolic food disorders Lactose intolerance Idiosyncratic reactions Sulfiting agents (sulfites) Monosodium glutamate (MSG) Food additives (colors)
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Lactose Intolerance Lactose Intolerance Metabolic disorder Associated with a deficiency of the intestinal enzyme, lactase Persons unable to metabolize lactose in dairy products Lactose maldigestion
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Idiosyncratic Reaction Idiosyncratic Reaction An adverse reaction to a food or food component among certain individuals occurring through unknown mechanisms
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Sulfite Sensitivity Sulfite Sensitivity Used in many foods as a preservative
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