If you have these lines on your nails after 40, it is a clear sign that..

elasticity and hair turns gray, nails also deal with structural changes over time. The production of keratin — the protein that forms nails — may slow down or become uneven, leading to changes in nail texture.

Main Causes After Age 40
Natural Aging Process
The most popular reason for vertical ridges is simply getting older. As we age, the body’s ability continue reading …