An allergic reaction to cabbage is rare, however, serious reactions are possible. Within a few minutes to an hour of ingesting cabbage, the immune system begins producing IgE antibodies that target the proteins present in cabbage.The symptoms are typically mild, however, anaphylaxis, a life-threatening reaction may occur.

Cabbage causes allergic reactions and can have serious side effects of food allergies. After eating cabbage, it begins to produce protein in the immune system. The immune system will recognize the protein as a threat and stimulate the production of IgE antibodies.

Symptoms of a cabbage allergy can vary from person to person, but they often include itching, hives, swelling, and digestive issues such as nausea, vomiting, or diarrhea. In severe cases, anaphylaxis can occur, leading to a sudden drop in blood pressure, difficulty breathing, and even loss of consciousness.