Is it normal for a protein shake to bubble?
                                
                                
                                •
                                
                                
                        
                                    
                                    4 min read                                
                            
                                Protein powders are comprised of amino acid chains that, when agitated in liquid, have a natural tendency to trap air, which is why it is perfectly normal for a protein shake to bubble. This foaming is a common occurrence, especially with certain protein types, and is not a sign of a defective or poor-quality product.