Vitamin C Serum with THDA for Visible Brightening and Firmness

Award-winning. Pharmacist-formulated. Lipid-based.

Transdermal C Serum is a clinical-grade vitamin C serum formulated with tetrahexyldecyl ascorbate (THDA), a stable, lipid-soluble form of vitamin C designed to support the appearance of firmness, clarity, and even tone.

Unlike traditional water-based vitamin C serums, this formula uses a transdermal lipid delivery system to support deeper penetration and enhanced stability without oxidation concerns.

Formulated with 100% active and/or functional, lipid-based ingredients and no water or fillers, this vitamin C serum helps:

• Support the look of collagen-rich skin
• Improve visible brightness and clarity
• Reduce the appearance of fine lines
• Strengthen the skin barrier
• Defend against environmental stressors

Why Lipid-Soluble Vitamin C?

Most vitamin C serums use water-soluble ascorbic acid, which can oxidize quickly and irritate sensitive skin. THDA is oil-soluble, more stable, and designed to work in harmony with the skin’s natural lipid structure.

This is skin nutrition, not surface-level treatment.
For those seeking a high-performance vitamin C serum that prioritizes stability, delivery, and barrier health, Transdermal C Serum sets a new clinical standard.

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