The stratum corneum is the outermost layer of cells in our epidermis and plays a protective role for the skin. If the stratum corneum is too thin, the skin is prone to redness and sensitivity. If it's too thick, the skin can appear yellowish and dull. Moreover, excessively thickened dead skin can also affect the skin's ability to absorb nutrients. So, how do we remove the old keratin and restore the fineness of the skin? Let's take a look at some practical methods for exfoliation below.