Ingredient
Linolenic Acid
Alpha-Linolenic Acid
ALA
Omega-3 Fatty Acid
What it is
An essential omega-3 polyunsaturated fatty acid found in oils such as flaxseed and perilla, used in skincare as an emollient and skin-conditioning ingredient that complements linoleic acid in supporting the skin's lipid barrier. It is more prone to oxidation than saturated or monounsaturated fatty acids.
How it works
Its polyunsaturated structure integrates into skin-surface lipids to soften and condition, while its multiple double bonds also let it participate in radical-scavenging reactions, though this same reactivity makes formulas containing it more sensitive to rancidity.
What it does
Emollient
Skin conditioning
Antioxidant
Concerns to know
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Barrier & hydration support
A well-studied humectant or emollient that helps hydrate the skin and support its moisture barrier.