Vitamin C

Tetrahexyldecyl Ascorbate: 
The Stable Vitamin C Derivative for Brighter, Healthier Skin 

Next-Generation Vitamin C 

Vitamin C has long been one of the most trusted and transformative ingredients in skincare. Known for its ability to brighten, protect and support collagen, it remains a cornerstone of effective routines worldwide. 

Yet not all forms of vitamin C are created equal. 

The most common form, L-ascorbic acid, can be highly unstable and often irritating, limiting its effectiveness for many skin types. 

At ISUN, we take a more advanced approach. 

A Smarter Form of Vitamin C 

We use tetrahexyldecyl ascorbate, a next-generation, lipid-soluble derivative of vitamin C designed to deliver results with greater stability and comfort. 

Derived from pure ascorbic acid through a gentle fermentation process, this ingredient is then combined with plant-based fatty acids (such as those from coconut) through esterification. The result is a sophisticated hybrid molecule that: 

Intelligent Delivery for Lasting Results 

Unlike traditional vitamin C, which acts quickly but degrades rapidly, this advanced form functions as a reservoir within the skin. 

Once applied: 

This slow-release mechanism ensures consistent performance, without overwhelming the skin. 

Visible Benefits, Thoughtfully Delivered 

Brighter, More Even Skin Tone 

By helping to inhibit tyrosinase, the enzyme responsible for melanin production, this form of vitamin C supports a more luminous, even complexion over time. 

Smoother, Firmer Skin 

Vitamin C plays a critical role in collagen synthesis. This derivative helps strengthen and stabilize collagen, improving firmness and softening the appearance of fine lines. 

Daily Antioxidant Protection 

Environmental stressors like UV exposure and pollution generate free radicals that accelerate skin aging. This ingredient helps neutralize those effects, supporting long-term skin health. 

Gentle Yet Effective 

Because it works gradually and does not require a low pH, it is far less irritating than conventional vitamin C. 

Ideal for: 

Stability You Can Trust 

Traditional vitamin C is notoriously unstable, oxidizing quickly when exposed to light and air, often losing its effectiveness. 

Tetrahexyldecyl ascorbate offers a more reliable alternative: 

This means your skincare works as intended, consistently and effectively. 

A Different Kind of Transformation 

This advanced form of vitamin C works progressively rather than instantly. While results may appear more gradual, they are also more sustainable. 

For many, this balanced approach, steady, gentle and effective, is exactly what the skin needs. 

How to Integrate Into Your Routine 

Versatile and easy to use, this ingredient fits seamlessly into daily skincare: 

Experience ISUN’s Vitamin C Formulations 

You’ll find this advanced vitamin C across a curated range of ISUN formulations, including: 

The ISUN Philosophy 

At ISUN, we believe skincare should work in harmony with the skin, delivering results through intelligent formulation, botanical synergy and uncompromising quality.