The cells in the superficial or upper layers of skin, known as the epidermis, are constantly replacing themselves. This process of renewal is basically exfoliation (shedding) of the epidermis. But the deeper layers of skin, called the dermis, do not go through this cellular turnover and so do not replace themselves.

How long does it take for epidermis to grow back?

It's job is crucial: to protect you from infections and germs. Throughout your life, your skin will change constantly, for better or worse. In fact, your skin will regenerate itself approximately every 27 days.

What helps skin grow back?

In order to make collagen, you need vitamin C. Eating foods with vitamin C can promote skin healing by stimulating new skin cells to grow in the damaged area. In addition to this, vitamin C can also help the healing process by building new protein for the skin, scar tissue, tendons, ligaments and blood vessels.