The saturated portion of emollient ingredient squalene, which is a natural component of human skin sebum (oil). It is a wonderfully moisturizing ingredient as well as being a source of replenishing fatty acids and antioxidants.
Note that because it’s highly saturated, squalane is less prone to breaking down in the presence of air than less-saturated squalene.
References for this information:
The Journal of Clinical and Aesthetic Dermatology, June 2014, pages 25-32
Advances in Food and Nutrition Research, Volume 65, 2012, pages 223-233
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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!