Poly - Glycerin-4 vs Propanediol
Poly - Glycerin-4 and Propanediol are both draws in moisture ingredients. Poly - Glycerin-4 is found in 1 product while Propanediol appears in 605, making Propanediol the more widely used option.
Poly - Glycerin-4
Draws in moisture
Propanediol
Draws in moisture