INCI: Linolenic Acid - Also known as: Alpha-Linolenic Acid, ALA, Omega-3 Fatty Acid, 18:3 (n-3)

QUICK FACTS

What is linolenic acid?

Linolenic acid (specifically alpha-linolenic acid, or ALA) is a polyunsaturated omega-3 fatty acid classified as essential - the body cannot synthesize it and must obtain it externally. It is the primary omega-3 fatty acid in the plant kingdom, found in high concentrations in flaxseed oil, chia seed oil, and in the seed oils of several botanical species used in skincare - including rosehip, raspberry, sea buckthorn, and evening primrose.

In Sweet Chemistry's formulas, linolenic acid is present both as a free fatty acid below 1% in the Hydra-Serum and Oil-Serum, and in high concentrations via the omega-3-rich botanical seed oils used across all four formulas. Raspberry seed oil (approximately 33% ALA), rosehip seed oil (approximately 33-38% ALA), and sea buckthorn seed oil (approximately 30-35% ALA) are among the highest omega-3 botanical oils available for topical use - making the cumulative linolenic acid contribution across the Sweet Chemistry system significantly larger than the free fatty acid listing alone would suggest.

As the omega-3 counterpart to linoleic acid (omega-6), linolenic acid completes the essential fatty acid pair in the Sweet Chemistry formulas - with each of the two essential fatty acids associated with distinct aspects of the barrier and surface environment.

What does it do for skin?

Linolenic acid's studied contributions to skin operate primarily at the surface lipid and inflammatory mediator levels. As an omega-3 fatty acid, ALA is a precursor in the n-3 fatty acid cascade - the pathway that ultimately produces eicosanoids and resolvins studied in connection with a more comfortable, less reactive-looking skin surface. Research exploring the relationship between topical omega-3 fatty acids and skin surface behavior has associated higher omega-3 skin content with a more settled, less reactive-appearing surface environment - a particularly relevant property for reactive, sensitive, and dry skin types where surface comfort is a consistent concern.

At the barrier level, linolenic acid contributes to the skin's intercellular lipid environment alongside linoleic acid and cholesterol. While linoleic acid has a more specific structural role in the ceramide EOP architecture, linolenic acid's contribution is primarily to the broader lipid bilayer fluidity and to the surface fatty acid environment - supporting a more supple, comfortable-feeling skin surface over consistent use.

In combination with the ceramide complex, phytosphingosine, cholesterol, and linoleic acid present across the Sweet Chemistry system, linolenic acid completes the essential fatty acid dimension of the comprehensive barrier lipid approach. No single fatty acid can address all aspects of the barrier lipid environment - the diversity of the botanical oil panel, which provides both omega-3 and omega-6 essential fatty acids from multiple botanical sources, reflects this multi-fatty-acid philosophy.

FOUND IN

In All 4 Formulas

Linolenic acid is present as a free fatty acid in the Hydra-Serum and Oil-Serum, and delivered at meaningful concentrations via omega-3-rich botanical seed oils across all four Sweet Chemistry formulas - making it one of the most consistently present essential fatty acids in the system.

Nourishment - All Skin Types

Barrier Repairing Hydra-Serum Linolenic Acid (free fatty acid + via rosehip seed oil) - 1.0 oz / 30 ml

The Hydra-Serum delivers linolenic acid as both a free fatty acid and through rosehip seed oil - alongside 3% ceramides, linoleic acid, and 1% cholesterol as part of the complete barrier lipid trio in a 40%-active emulsion.

Hydration - Dry to Normal

Elasticity Reinforcing Hydra-Cream Linolenic Acid (via rosehip and raspberry seed oils) - 1.7 oz / 50 ml

The Hydra-Cream delivers linolenic acid through organic rosehip and raspberry seed oils, working alongside the three-ceramide barrier complex and 3% Matrikynes® peptides in a 40%-active cushioned satin finish.

Hydration - Dry to Dehydrated

Elasticity Reinforcing Lipid-Cream Linolenic Acid (via rosehip, raspberry, sea buckthorn, and cranberry seed oils) - 1.7 oz / 50 ml

The Lipid-Cream delivers linolenic acid through multiple omega-3-rich seed oils alongside shea butter and the full ceramide barrier complex - the most comprehensive botanical omega-3 delivery in the water-based Sweet Chemistry range.

Nourishment - Dry to Combination

Barrier Repairing Oil-Serum Linolenic Acid (free fatty acid + via multiple organic botanical oils) - 1.0 oz / 30 ml

The Oil-Serum delivers linolenic acid at the highest cumulative concentration in the system - as a free fatty acid below 1% and through eleven organic botanical oils each at greater than 5%, including rosehip, raspberry, sea buckthorn, and evening primrose - the most comprehensive essential fatty acid botanical panel in the Sweet Chemistry lineup.

WORKS TOGETHER WITH

Omega-6 Fatty Acid Linoleic Acid

INCI: Linoleic Acid.

Present as a free fatty acid in the Hydra-Serum and Oil-Serum alongside linolenic acid, and delivered via botanical oils across all four formulas. Synergy Note: Linolenic acid (omega-3) and linoleic acid (omega-6) are the two essential polyunsaturated fatty acids in skin - their co-presence addresses both the ceramide EOP-associated omega-6 structural requirement and the omega-3-associated surface comfort dimension simultaneously.

Barrier Lipid Ceramide EOP

INCI: Ceramide EOP.

Present in the Hydra-Cream and Lipid-Cream as the acylceramide that contains esterified linoleic acid in its structure. Synergy Note: While linolenic acid does not directly participate in Ceramide EOP's structure (that role belongs to linoleic acid), its presence alongside Ceramide EOP in the same formula contributes to the complete essential fatty acid environment of the barrier lipid system.

Botanical Seed Oil Rosehip Seed Oil

INCI: Rosa Rubiginosa (Rosehip) Seed Oil.

Present in all four formulas as the most consistent high-omega-3 botanical oil in the system. Synergy Note: Rosehip seed oil is the primary botanical vehicle for linolenic acid delivery across the Sweet Chemistry system - free linolenic acid and rosehip-derived linolenic acid work in complement to provide layered omega-3 delivery through both isolated and whole-oil sources.

Fat-Soluble Antioxidant Tocopherol / Tocopheryl Acetate

INCI: Tocopherol, Tocopheryl Acetate.

Present across all four formulas as the primary lipid-phase antioxidant. Synergy Note: Alpha-linolenic acid is a highly polyunsaturated fatty acid prone to lipid peroxidation - tocopherol's lipid-phase antioxidant character is directly relevant to protecting linolenic acid's structural integrity both within the formula and at the skin's surface after application.