Does Vitamin B12 Deficiency Make Skin Darker? A Comprehensive Nutrition Diet Guide
                                
                                
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                                    4 min read                                
                            
                                Case reports and medical studies show that vitamin B12 deficiency is a known cause of cutaneous hyperpigmentation, or darkening of the skin. The discoloration can be an early indicator of low vitamin levels, often appearing before more severe neurological or hematological symptoms.