According to the Personal Care Product Council’s Ingredient Infobase online, methylpropanediol is a synthetic ingredient that functions as solvent. In a cosmetic formula, it can enhance the absorption of ingredients such as salicylic acid. It also has pronounced hydrating properties that can leave a smooth, dewy finish on skin.
About the Experts
Paula Begoun is the best-selling author of 20 books about skincare and makeup. She is known worldwide as The Cosmetics Cop and creator of Paula’s Choice Skincare. Paula’s expertise has led to hundreds of appearances on national and international radio, print, and television including:
The Paula's Choice Research Team is dedicated to busting beauty myths and providing expert advice that solves your skincare frustrations so you can have the best skin of your life!