Does Egg Shell Have Iodine? The Surprising Truth About Egg Minerals
                                
                                
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                                    4 min read                                
                            
                                It is a widely known fact that eggshells are predominantly composed of calcium carbonate, making them an incredible source of this vital mineral. However, when inquiring, "does egg shell have iodine?", the answer is more nuanced and is largely determined by what a chicken eats.