Tetrahexyldecyl Ascorbate
Tetrahexyldecyl Ascorbate — an oil-soluble, highly stable vitamin C derivative that penetrates the skin's lipid layers well and converts to active ascorbic acid, delivering antioxidant and brightening benefits. It is often used in anhydrous or oil-based formulas and is valued for its resistance to oxidation.
Key points
- Tetrahexyldecyl ascorbate (THD ascorbate) is fat-soluble, allowing it to blend easily into oils and rich emulsions.
- Its stability makes it a popular choice for serums intended to have a longer shelf life.
- Being lipophilic, it can absorb effectively without requiring the very low pH that L-ascorbic acid needs.
- It is often studied for its potential to support collagen and a more even skin tone.
Frequently asked
Is tetrahexyldecyl ascorbate better than L-ascorbic acid?
It is more stable and less irritating, though the two are formulated differently, and effectiveness depends on the overall product and how your skin responds.
Does tetrahexyldecyl ascorbate feel greasy?
Because it is oil-soluble, it is usually delivered in oil-based products that can feel richer, though well-formulated serums typically absorb without a heavy residue.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
