Mustard is a common food allergen that can cause allergic reactions in some individuals. Mustard allergy is an immune system response to proteins found in mustard seeds, which are used as a spice or seasoning in various cuisines. The allergic reactions can range from mild to severe, and individuals with mustard allergy need to avoid consuming mustard and products containing mustard.
Mustard can be found in various food products, including condiments, salad dressings, marinades, sauces, pickles, and processed meats. It may also be present in spice blends, curry powders, and some snack foods.