Type of protein known as a glycoprotein (protein + carbohydrate) that's naturally found in the skin. Fibronectin’s deterioration from external factors is an element in skin aging and wrinkling. As is true for all proteins, regardless of their origin, it's a good water-binding agent for skin. However, applying it topically doesn’t help the fibronectin in your skin.

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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!