Foods To Avoid For Nasal Polyps
MSG And Sulfites

Sulfites are preservatives that are frequently used to delay the growth of mold on food. They also increase freshness. Sulfites may be referred to as sulfurous acid, sulfites, and sulfur dioxide, among others. Common foods that contain sulfites include soup mixes, pickled foods, dried fruit, potato chips, wine, vegetable juice, beer, apple cider, and condiments. Frozen shrimp, guacamole, maraschino cherries, lemon juice, and canned vegetables also contain sulfites. Monosodium glutamate (MSG) is a flavor enhancer often included in canned vegetables, processed meats, and canned soups.
Both MSG and sulfites are common sources of sensitivity in individuals when they are consumed. Much like the white blood cell cascade that occurs in individuals who are allergic to soy, the same immune response can occur with sulfites and MSG. The allergic reaction contributes to the increased amount of mucus in the nasal passages. This will increase the severity of nasal polyp symptoms.
Food With Gluten

Gluten is a protein that naturally occurs in grains, including barley, rye, spelt, and wheat. Flours tend to form a glue-like sticky network substance when combined with water due to gluten. While most individuals can eat gluten without significant adverse effects, others may be sensitive to it or even be severely allergic. Individuals who are sensitive or allergic to gluten can experience symptoms that are associated with an increased immune system response to the protein. Their body may recognize it as a foreign invader.
The increased immune response can send all components into overdrive, including the mucous membranes that line the nose, oral cavity, and other digestive organs. When an individual consumes gluten, an abnormal flood of histamine and other inflammatory chemicals can cause their nasal passages to become swollen and irritated. This swelling and irritation combined with nasal polyps can obstruct the sinuses and nasal passages. This produces the telltale symptoms of nasal congestion and sinus pain.