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- Categories: Texture Enhancer
Along with other glycols and glycerol, propylene glycol is a humectant (hydrating) and delivery ingredient used in cosmetics.
There are websites and spam e-mails stating that propylene glycol is really industrial antifreeze and that it’s the major ingredient in brake and hydraulic fluids. These sites also state that tests show it’s a strong skin sensitizer.
They further point out that the Material Safety Data Sheet (MSDS) on propylene glycol warns users to avoid skin contact. As ominous as this sounds, it’s so far from the reality of cosmetics formulations that almost none of it holds any water or poses any real concern.
In fact, research from toxicologists has shown that propylene glycol and similar ingredients don’t present a health risk for people when used in cosmetics.
It’s important to realize that the MSDS refers to a 100% concentration of a substance. Even water and salt have frightening comments regarding their safety according to their MSDS reports.
In cosmetics, propylene glycol is used in small amounts to keep products from melting in high heat or from freezing. It also helps active ingredients penetrate skin. In the amounts used in cosmetics, it’s not a concern in the least.
The Cosmetic Ingredient Review Board and other groups have analyzed all of the toxicology data and exposure studies concerning topical application of propylene glycol as commonly used in cosmetics products. Their conclusion was that it is safe and does not pose a health risk to consumers.
References for this information:
Critical Reviews in Toxicology, April 2013, issue 4, pages 363-390
International Journal of Toxicology, Supplement, September-October 2012, pages 245S-260S
Skin Pharmacology and Applied Physiology, Volume 14, 2001, pages 72-81
Agency for Toxic Substances and Disease Registry. Public Health Statement: Ethylene Glycol and Propylene Glycol. [Internet]. 1997
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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!