Antioxidant

Tetrahexyldecyl Ascorbate

Often labeled as: THD Ascorbate

The oil-soluble Vitamin C that penetrates deeper than the rest.

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Overall Safety Safe

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Pregnancy Safety Safe

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Comedogenic (0-5) 0 / 5

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Irritancy (0-5) 1 / 5

🎯 At a Glance

🔬 How It Actually Works

A highly stable, oil-soluble Vitamin C derivative. Because the skin's barrier is lipid (oil) based, THD penetrates faster and deeper than water-soluble Vitamin C.

💖 Why your skin loves it

Fades deep hyperpigmentation, boosts collagen, and operates without stinging.

💡 Pro Tip

A phenomenal option for mature, dry, or sensitive skin types.

⚖️ Myth vs. Fact

The Myth

Pure Vitamin C is always superior.

The Science

THD Ascorbate often outperforms pure Vitamin C in deeper dermal collagen stimulation due to its penetration.

🧪 The Mixology Guide

Skincare is chemistry. Here is how Tetrahexyldecyl Ascorbate interacts with other active ingredients on your shelf.

Plays Well With (Synergy) Tocopherol → Tocopheryl Acetate →

🤓 Geeky Details

Origin Synthetic

pH Environment pH 5.0 - 6.0

🧴 Formulations featuring Tetrahexyldecyl Ascorbate

★ 9.5

Skinmade

Multi Vitamin + Caffeine Brightening Eye Serum

Eye Care

A highly sophisticated, feather-light clinical eye treatment designed to tackle puffiness and genetic hyperpigmentation simultaneously. Skinmade avoids heavy, milia-inducing eye creams, opting instead for a rapid-absorbing serum vehicle. It features highly stable 3 percent lipid-soluble Vitamin C (Tetrahexyldecyl Ascorbate) and a triad of tyrosinase inhibitors (Kojic Acid Dipalmitate, Licorice, Alpha Arbutin) to shut down localized melanin production flawlessly. Furthermore, the precise dose of Caffeine acts as a diuretic, immediately stimulating microcirculation to drain water retention and under-eye puffiness. The texture is a brilliant, water-light fluid that sits perfectly under daytime concealers without creasing.

★ 9.6

Skinmade

Hyaluronic Acid + Vitamin C Serum

Serum

The ultimate 2-in-1 morning staple. Instead of layering a sticky hydrating serum and a separate antioxidant step, this fluid combines multiple weights of Hyaluronic Acid with THDA (a highly stable, lipid-soluble Vitamin C) and Niacinamide. It floods the cellular boundaries with water to instantly plump dry lines while providing crucial antioxidant defense beneath your sunscreen. The texture is a viscous but highly spreadable hydro-gel that locks flat onto the skin instantly, serving as the perfect hydration primer.