What vitamin makes your skin dark?
                                
                                
                                •
                                
                                
                        
                                    
                                    3 min read                                
                            
                                According to research, up to 1 in 5 patients with a deficient vitamin B12 level may have cutaneous hyperpigmentation. Addressing what vitamin makes your skin dark involves understanding the complex effects of both nutrient deficiencies and excesses, as well as external factors like product oxidation.