Have you ever seen glycerin, glycerine or glycerol listed in the ingredients of any of your skin care products?  Ever wondered what it was doing there? A Little Background: First, glycerin, glycerine, and glycerol are used interchangeably, and they all are the same when it comes to skincare. It is colorless, odorless and sweet-tasting.  In fact, it is derived from the Greek word glyko which means “sweet”.  Glycerin was discovered by a Swedish chemist named Carl Wilhelm Scheele in the late 1700’s and Proctor and Gamble started producing it around…