Beetroot allergies are extremely rare. As of a 2023 case report, there have only been three reported cases of allergy to boiled beetroot. There are no reported allergic reactions to pickled beets to date. Beetroot allergies are extremely rare. As of a 2023 case report, there have only been three reported cases of allergy to boiled beetroot. There are no reported allergic reactions to pickled beets to date.