What Foods Contain Casein? A Complete Guide to Dairy and Hidden Sources
                                
                                
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                                    4 min read                                
                            
                                Approximately 80% of the protein in cow's milk is casein, a family of phosphoproteins also found in the milk of other mammals. Understanding what foods contain casein is crucial for individuals with allergies, sensitivities, or those following a dairy-free diet.