Fingernail ridges are visible lines or grooves ... provider about taking dietary supplements (such as iron or zinc) if you ...

Are you paying close attention to the state of your nails? Ridges, peeling ... for oxygen transport to nail cells. “An iron deficiency can lead to brittle or spoon-shaped nails,” says Nuttall.

a vitamin B12 deficiency could manifest in bluish discoloration and darkened streaks on your nails. You need magnesium for ...

To reverse the deficiency ... or receiving enough nutrients. "Ridges in the nails could be a sign of numerous nutrient deficiencies, such as protein, iron, zinc or minerals," Fiona said.