What Vitamin Deficiency Causes Calloused Skin Around Fingernails?
                                
                                
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                                    4 min read                                
                            
                                While severe nutrient deficiencies are rare in developed countries, they can cause a range of dermatological issues. For those wondering what vitamin deficiency causes calloused skin around fingernails, the answer often involves multiple nutrients, with Vitamin A being a primary suspect due to its role in skin cell regulation.