Additives in food; Artificial flavors and color
Intentional or direct food additives are added to foods to produce a desired effect, such as to maintain freshness, improve nutritional quality, assist in processing or preparing food, or make a food more appealing.
Unintentional or indirect food additives are substances that are found in food during the production or the processing of a particular item. These are present in minimal quantities in the final product.
Bush RK, Taylor SL, Hefle SL. Adverse reactions to food and drug additives. In: Adkinson NF Jr, ed. Middleton’s Allergy: Principles and Practice. 6th ed. Philadelphia, Pa: Mosby Elsevier; 2003:chap 90.