Tag: Black nails

Research from the National Institutes of Health shows that nail discoloration is often linked to underlying systemic issues, including nutritional deficiencies. This makes it crucial to understand which deficiency causes black nails, as it could be a sign of a deeper health problem rather than just a cosmetic concern.

While nail trauma is the most common cause of black or dark discoloration, studies have documented that nutritional deficiencies, especially a severe lack of vitamin B12, can also lead to hyperpigmentation known as melanonychia. Understanding what deficiency causes nails to turn black is key to addressing the issue with the right dietary and medical approach.