The Glycerin used in Glysolid is vegetable based.Principle effect of Glycerin: A skin softener; it keeps skin cells supple and flexible.Principle effect of Allantoin: Stimulates skin cell regeneration and the healing of small injuries, nicks, scrapes and minor burns.Glysolid® works differently. It is thick, smooth, and silky. When applied to the skin, Glysolid adds a light protective film, locking in your skin's natural oils and moisture. This protection lasts for hours, providing your skin with the soothing moisture to help repair even the driest skin.