Tag: Longitudinal melanonychia

While often benign, dark lines on the nails, known as longitudinal melanonychia, can be a symptom of various health conditions. The connection between nutritional status and nail health is well-documented, and emerging evidence suggests that certain deficiencies, including low vitamin D, may play a role in this nail pigmentation.

According to the National Institutes of Health, vitamin B12 deficiency can lead to skin and nail abnormalities, including hyperpigmentation. Specifically, vitamin B12 deficiency is a known cause of **longitudinal melanonychia brown line on nails**, a condition characterized by brownish-black streaks on the nail plate. This article will delve into the nutritional link behind this condition, its underlying mechanisms, and the dietary steps to reverse it.