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9 Common Food Allergens You Should Know

Written by Alison Channon
Posted on February 20, 2026

In the United States, food manufacturers must label nine common food allergens on their products. These are often referred to as the “Top 9” or sometimes the “Big 9.” These allergens account for more than 90 percent of all food-related allergic reactions in the U.S.

Here’s what to know about the most common food allergens in the U.S.

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