Vertical lines on fingernails

There are vertical lines on the fingernails may be zinc deficiency, zinc is an essential trace element for the human body. In normal life, we should eat more foods containing zinc, such as oysters, beef, etc. Although the food tonic is slow, it is the best. It may also be that the liver is not good, the toxins in the body cannot be discharged from the body, and the accumulation of toxins in the body will accelerate the speed of cell death in the body. It can be displayed on the nails. The nails show vertical lines, and the nails are black, indicating that the liver is not good.