Tetrahexyldecyl Ascorbate (THDC) is a colorless to pale yellow liquid and a highly stable, oil-soluble form of Vitamin C. Unlike L-ascorbic acid, it is lipid-soluble, allowing it to penetrate deeper into the skin for enhanced effectiveness.
It provides strong antioxidant protection, helping to inhibit lipid peroxidation and protect the skin from environmental damage. THDC supports collagen production, helping to reduce the appearance of fine lines and wrinkles while improving skin brightness and tone. Its fatty acid structure enhances skin absorption and delivery.
This advanced Vitamin C derivative works well alongside other antioxidants and actives such as Vitamin E, green tea extract, retinol, and other forms of Vitamin C, making it ideal for anti-aging and brightening formulations. Studies show it helps reduce signs of photodamage and visibly improve hyperpigmentation.
Key Benefits
Oil-soluble Vitamin C for deep skin penetration
Brightens skin and evens tone
Helps reduce wrinkles and signs of aging
Powerful antioxidant protection
Supports collagen synthesis
Helps reduce photodamage and hyperpigmentation
Suggested Usage Rate: 1–10% (can be used up to 30%)
INCI Name: Tetrahexyldecyl Ascorbate
Appearance: Liquid
pH Range: < 6.5
Formulation: Add during cool-down phase
Also known as: THD Ascorbate, THA, Tetrahexyldecylascorbate, Ascorbyl Tetraisopalmitate
