What deficiency causes dark skin around nails and how to treat it?
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4 min read
Studies have shown a strong link between vitamin B12 deficiency and skin hyperpigmentation, including the darkening around the nails and knuckles. This occurs because low B12 levels can disrupt melanin production. So, what deficiency causes dark skin around nails? While a lack of vitamin B12 is a primary nutritional culprit, it is crucial to understand all potential causes and appropriate treatments.
