INCI: Thioctic Acid - Also known as: Alpha-Lipoic Acid, ALA, 1,2-Dithiolane-3-pentanoic acid
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Key |
Value |
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INCI Name |
Thioctic Acid |
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Category |
Enzymatic Antioxidant / Universal Antioxidant |
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Concentration in Formula |
Functional level in the Barrier Repairing Hydra-Serum, Elasticity Reinforcing Hydra-Cream, and Elasticity Reinforcing Lipid-Cream |
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Suitable For |
All skin types and tones |
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Origin |
Synthetic (bioidentical to naturally occurring alpha-lipoic acid) |
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Irritation Risk |
Low |
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Comedogenic Rating |
0 |
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Research Base |
Extensive peer-reviewed literature on topical ALA for skin antioxidant defense |
Thioctic acid, more widely known in the scientific literature as alpha-lipoic acid (ALA), is a naturally occurring sulfur-containing fatty acid that functions as a coenzyme in mitochondrial energy metabolism. What makes it particularly valuable in skincare formulation is a property that distinguishes it from most antioxidants: it is soluble in both water and oil. Most antioxidants are limited to one phase - vitamin C derivatives work in the water phase, vitamin E in the oil phase. Alpha-lipoic acid is studied across both, making it a broad-coverage addition to an antioxidant system.
ALA is produced endogenously in small amounts by the body and found in trace quantities in foods such as spinach, broccoli, and organ meats. In its reduced form (dihydrolipoic acid, or DHLA), it is researched as one of the more potent antioxidants available - with the studied ability to support the regeneration of other oxidized antioxidants including vitamin C, vitamin E, and glutathione back toward their active states. This regenerative character makes it not just an antioxidant contributor, but one that may extend the activity of the other antioxidants it is formulated with.
At Sweet Chemistry, thioctic acid is formulated into all three water-based products as part of a coordinated enzymatic antioxidant trio alongside ubiquinone (CoQ10) and resveratrol - each addressing a distinct antioxidant pathway for a more complete approach to free radical defense than any single antioxidant can deliver.
Alpha-lipoic acid's dual solubility is studied in connection with its ability to address free radicals in both the lipid-rich environment of the stratum corneum and the water-based environment of the viable epidermis. Free radical activity in both phases is associated with accelerated breakdown of the skin's collagen structure, inflammatory signaling, and the visible markers of skin aging including fine lines, uneven tone, and loss of firmness. By covering both environments, thioctic acid is designed to provide broader antioxidant coverage than oil-phase or water-phase antioxidants alone.
Its possible role in supporting the activity of vitamin C is particularly relevant in the context of the Sweet Chemistry creams. In both creams, 2% THD ascorbate (an oil-soluble vitamin C derivative) is present alongside thioctic acid. Research on alpha-lipoic acid suggests it may help support the reduction of oxidized vitamin C back toward its active form - potentially extending vitamin C's functional contribution within the formula and on the skin beyond what the stated concentration alone would imply.
Research has also explored alpha-lipoic acid's association with NF-kB, a transcription factor studied in connection with pro-inflammatory pathways involved in UV-related skin change and chronic skin reactivity. This is a research-based association rather than a proven cosmetic outcome, but it provides a rational basis for thioctic acid's inclusion as part of a multi-ingredient approach to a calmer-looking, more resilient skin surface - complementing the barrier lipid complex in the same formulas.
In 3 Formulas
Thioctic acid is present across all three Sweet Chemistry water-based formulas as part of a three-antioxidant enzymatic system. Its water-and-oil dual solubility makes it a particularly versatile component of an emulsion-based antioxidant approach.
Nourishment - All Skin Types
Barrier Repairing Hydra-Serum Thioctic Acid - 1.0 oz / 30 ml
The Hydra-Serum delivers thioctic acid alongside ubiquinone and resveratrol within a 40%-active, water-based emulsion also containing 3% Matrikynes® peptides, 5% niacinamide, and 3% ceramides.
Hydration - Dry to Normal
Elasticity Reinforcing Hydra-Cream Thioctic Acid - 1.7 oz / 50 ml
In the Hydra-Cream, thioctic acid works alongside 2% THD ascorbate, ubiquinone, and resveratrol - with its studied association with vitamin C activity directly relevant to the THD ascorbate present in the same formula.
Hydration - Dry to Dehydrated
Elasticity Reinforcing Lipid-Cream Thioctic Acid - 1.7 oz / 50 ml
The Lipid-Cream pairs thioctic acid with 2% THD ascorbate and the full antioxidant complex within the richest formula in the lineup - designed for dry and dehydrated skin that benefits from both deep emollience and active oxidative defense.
Mitochondrial Antioxidant Ubiquinone (CoQ10)
INCI: Ubiquinone.
Present at 0.5% in the Oil-Serum and at functional levels in all three water-based formulas. CoQ10 is a fat-soluble antioxidant studied in connection with cellular energy support and free radical defense at the mitochondrial level. Synergy Note: Alpha-lipoic acid and CoQ10 are both researched in connection with mitochondria-associated antioxidant pathways - their different but overlapping associations make them a complementary pair within the same antioxidant system.
Stable Vitamin C THD Ascorbate
INCI: Tetrahexyldecyl Ascorbate.
At 2% in both creams and 7% in the Oil-Serum, THD ascorbate is the primary vitamin C active across three Sweet Chemistry formulas. Synergy Note: Alpha-lipoic acid is studied for its possible role in supporting the regeneration of oxidized vitamin C - meaning it may extend the antioxidant contribution of THD ascorbate in every formula where both are present.
Polyphenol Antioxidant Resveratrol
INCI: Resveratrol.
A stilbene polyphenol researched in connection with sirtuin-related pathways and collagen matrix protection, present across all three water-based Sweet Chemistry formulas alongside thioctic acid. Synergy Note: Thioctic acid covers the water-and-oil antioxidant environment; resveratrol is studied in connection with gene-expression-level oxidative stress response. They are researched to operate at different biological layers of the same concern.
ECM Peptide Complex Matrikynes® Bone Peptides
INCI: Hydrolyzed Cow Bone Extract.
A 3% concentrate of 315+ bioactive matrikine peptides across all four formulas, associated with improvements in the appearance of skin density and aging signs. Synergy Note: Free radical activity is associated with collagen breakdown. By addressing oxidative stress, thioctic acid contributes to a more favorable environment for the collagen-supportive activity associated with Matrikynes® peptides.
