What foods have parvalbumin? Your comprehensive guide to the fish allergen
                                
                                
                                •
                                
                                
                        
                                    
                                    4 min read                                
                            
                                According to the European Centre for Allergy Research Foundation, allergic reactions to fish are mainly caused by a protein called parvalbumin. This protein, a heat-stable and potent allergen, is a key concern for individuals with finned fish allergies.