What color are your nails if you have a B12 deficiency?
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4 min read
According to case reports, a vitamin B12 deficiency can cause a specific type of nail hyperpigmentation. While the most common presentation is pale or yellowish nails due to anemia, individuals—especially those with darker skin—may develop bluish-black, brown-gray, or dark streaks on their nails. These changes are often one of several indicators of an underlying deficiency.
