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Food additives are ingredients added to foods to enhance their appearance or taste or to act as a preservative to reduce spoilage.  Listed below are some common additives and symptoms if you have an allergic reaction. 

Name
Symptoms
Prevention
Tartrazine

(yellow food coloring)

Symptoms range from rashes to swelling to asthma and possibly even behavioral changes. Avoid foods and medicines colored with tartrazine.
Monosodium Glutamate

(flavor enhancer)

Symptoms that usually occur are headaches, tightness of the face, heating at the back of the neck, tingling in the fingers and arms,  increased heart rate, and dizziness and intestinal discomfort. It is safe for most people to consume, but avoid eating large amounts.
Sulfites

(preservative)

Most frequently symptoms are wheezing, difficulty breathing, and chest tightness in patients with known reactive airway disease. It is safe for most people to consume, but avoid eating large amounts.

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