Does Shell Contain Protein? A Look at Eggshells, Seashells & More
                                
                                
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                                    4 min read                                
                            
                                Did you know that while eggshells are approximately 95% calcium carbonate, the remaining five percent is an organic matrix that includes various proteins? The question, 'Does shell contain protein?' depends on the type of shell and its specific, complex composition.