Is a Tuna Sandwich a Good Source of Protein? The Complete Nutritional Guide
                                
                                
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                                    4 min read                                
                            
                                Containing all nine essential amino acids, canned tuna provides a high-quality, complete protein, making it a favorite for many health-conscious eaters. But does adding bread and mayo still make a tuna sandwich a good source of protein and a healthy meal choice?