Linseed Acid
What Linseed Acid is & what it does
Linseed Acid is a mixture of fatty acids derived from flaxseed (linseed) oil, rich in unsaturated chains such as linoleic and alpha-linolenic acid. In cosmetic and sunscreen formulas it works mainly as an emollient and surfactant building block, and it can be neutralized into soaps that help emulsify a product. A notable property is its high content of polyunsaturated fatty acids, which give it a soft, conditioning skin feel.
What does Linseed Acid do in skincare?
Linseed Acid is a blend of fatty acids from flaxseed oil that acts as an emollient and as a building block for mild cleansing soaps. It can help soften skin and, when neutralized, contribute to a formula's lather and emulsion. Its unsaturated fatty acids give a conditioning skin feel.
Is Linseed Acid natural or synthetic?
Linseed Acid is plant-derived, sourced from flaxseed (linseed) oil. The fatty acids are separated and purified from the natural oil. It is therefore considered a naturally derived ingredient, though it is processed before use.
Is Linseed Acid vegan?
Linseed Acid is typically vegan because it is derived from flaxseed, a plant source. The fatty acids come from the oil of the flax plant rather than from any animal. People following a strict vegan routine may still wish to confirm sourcing with the specific brand.
Sunscreens with Linseed Acid
We rate 15 sunscreens that contain it, showing the top 10 by overall score:
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RoC Soleil Protect Fluide High Tolerance Comfort Fluid SPF 50
84/100
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SoleilBiafine Sun Spray Milk Spf 50+ Child
84/100
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Piz Buin Allergy Facial Cream Sun Sensitive Skin - SPF 50+
81/100
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Piz Buin 1 Day Long Lasting Sun Lotion Spf 30
81/100
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RoC Soleil-Protect Anti-Wrinkle Smoothing Fluid Spf 50+ Sun Products
81/100
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Piz Buin Ultra Light Dry Touch Sun Fluid Spf 30
80/100
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Piz Buin Mountain Sun Cream spf 50+
80/100
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Piz Buin SPF 50
77/100
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Piz Buin Moisturising Sun Lotion SPF 50+
77/100
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Piz Buin Instant Glow Spf 50+
77/100