What am I lacking if I keep getting canker sores?
                                
                                
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                                    5 min read                                
                            
                                According to the American Academy of Oral Medicine, up to one-fifth of the population experiences canker sores, also known as aphthous ulcers. If you find yourself asking, "What am I lacking if I keep getting canker sores?", the answer often points towards nutritional deficiencies, alongside other potential triggers like stress and mouth trauma.