Is All Black Pepper Gluten-Free?
                                
                                
                                •
                                
                                
                        
                                    
                                    3 min read                                
                            
                                While pure black pepper, derived from the *Piper nigrum* plant, is naturally gluten-free, studies show that up to 12% of non-certified black pepper can exceed the FDA's 20 ppm gluten threshold due to processing cross-contamination. This makes the question 'is all black pepper gluten-free?' more complicated than it seems, especially for those with celiac disease or high gluten sensitivity.