Researched by Helena DeMaria-Williams
Formula IngredientEmollientLinoleic Acid
INCI: Linoleic Acid
Linoleic acid is an essential polyunsaturated omega-6 fatty acid and the most abundant fatty acid in the epidermis, where it acts as a structural precursor for ceramide synthesis and plays a central role in maintaining the stratum corneum's permeability barrier. Because the body cannot synthesise it, linoleic acid must be supplied through diet or topical application. When applied to skin, it integrates into the lipid bilayer, reinforcing the barrier and reducing transepidermal water loss — and research shows that sebum in acne-prone skin is notably deficient in linoleic acid, making topical replenishment beneficial.
Category
Emollient
Irritation Risk
Low
Skin Types
all skin types, oily, acne-prone, dry, barrier-compromised, hyperpigmentation, sensitive
What does this do in a formula?
barrier repair and strengthening, ceramide precursor, reduces acne and microcomedones, lightens hyperpigmentation and UV-induced sun spots, anti-inflammatory, moisture retention, cell membrane support
Is Linoleic Acid safe? Key considerations
Can Linoleic Acid cause irritation?
Low RiskLinoleic acid is a skin-identical ingredient with no known adverse effects at cosmetic concentrations. No EU CosIng Annex II or III restrictions apply. It is generally non-irritating and well tolerated by all skin types including sensitive skin.
Does Linoleic Acid increase sun sensitivity?
No RiskLinoleic acid does not increase photosensitivity. No sun protection precautions are required based on its presence in a formulation.
Is Linoleic Acid safe during pregnancy?
SafeLinoleic acid is an essential fatty acid that is a normal component of human skin and diet. Topical use is considered safe during pregnancy. No reproductive or developmental concerns are noted in available safety data for topical application.
How does Linoleic Acid work?
Linoleic acid is an essential polyunsaturated omega-6 fatty acid and the most abundant fatty acid in the epidermis, where it acts as a structural precursor for ceramide synthesis and plays a central role in maintaining the stratum corneum's permeability barrier. Because the body cannot synthesise it, linoleic acid must be supplied through diet or topical application. When applied to skin, it integrates into the lipid bilayer, reinforcing the barrier and reducing transepidermal water loss — and research shows that sebum in acne-prone skin is notably deficient in linoleic acid, making topical replenishment beneficial.
Which products contain Linoleic Acid?
Shop products that contain Linoleic Acid
