What vitamin deficiency causes fissuring of the lips?
                                
                                
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                                    4 min read                                
                            
                                Research consistently shows that inadequate intake of riboflavin, or vitamin B2, is a primary reason for the painful cracked lips associated with cheilosis and angular cheilitis. This guide explores which vitamin deficiency causes fissuring of the lips and offers a comprehensive look at the causes and solutions.