What Vitamin Deficiency Causes Nail Separation? A Guide to Onycholysis
                                
                                
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                                    5 min read                                
                            
                                According to Healthline, some vitamin and mineral deficiencies, particularly low levels of biotin (B7), iron, and zinc, are known to weaken nails and can lead to nail separation. While nail separation, or onycholysis, is often caused by external factors like trauma or infections, nutritional shortfalls can also be an underlying cause.