The REAL Cause of VERTICAL RIDGES on YOUR NAILS Your fingernails and toenails consist of hard material called keratin, which is made up of dead, hardened skin cells.
The REAL Causes of VERTICAL RIDGES On Your Nails
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The REAL Cause of VERTICAL RIDGES on YOUR NAILS Your fingernails and toenails consist of hard material called keratin, which is made up of dead, hardened skin cells.
The REAL Causes of VERTICAL RIDGES On Your Nails