Does Collagen Protein Have Side Effects? What You Need to Know
                                
                                
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                                    6 min read                                
                            
                                According to Healthline, collagen supplements are generally considered safe for most people, but mild side effects such as nausea and diarrhea have been reported. This raises the question for many consumers: does collagen protein have side effects, and are they serious enough to be concerned about?