Advanced THD Vitamin C Serum
Advanced THD Vitamin C Serum
THD is the most stable, most skin-compatible form of Vitamin C available. And it works.
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Stable daily Vitamin C. Water-free formula. No irritation. No compromise.
Real Results. Real People. 8 Weeks.
Dale · Advanced THD Vitamin C Serum · Week 6 · No filters
Trial Results
8-week independent trial
What This Serum Does
The Advanced THD Vitamin C Serum delivers stable, oil-soluble Vitamin C deep into the skin's lipid layers — where it converts to active Vitamin C and gets to work supporting collagen, evening skin tone and improving overall skin quality over time.
Unlike traditional Vitamin C serums, it does not oxidise, does not irritate and does not turn orange in the bottle. It absorbs quickly, leaves no greasy residue and works consistently — every single day.
What Our Trial Participants Said
"Reduced sunspots, skin feels smoother. Very happy — easy to use, and some visible results."
Dale
Advanced THD Vitamin C Serum · Week 6 (still using at Week 10)
"Brighter and smoother — my skin tone is so much more even and calmer. The redness I'd had for years just settled down."
Wendy
Advanced THD Vitamin C Serum · 8 weeks
"Skin feels smoother and my lines feel less pronounced. Skin tone feels better."
Jude
Advanced THD Vitamin C Serum · 8 weeks
WHAT YOUR SKIN WILL FEEL
- Brighter, more even skin tone with consistent use
- Smoother skin texture from the first few weeks
- Softer appearance of fine lines over time
- Reduced redness and a calmer, more settled complexion
- Daily antioxidant protection against environmental stressors
- Confident that your Vitamin C is stable, clean and working every day
THIS IS FOR YOU IF:
- You want Vitamin C that doesn't degrade before it reaches your skin
- Your skin is sensitive and previous Vitamin C serums have caused irritation
- You care deeply about what goes on your skin and won't compromise on ingredients
- You want visible results without aggressive formulations
- You're ready to commit to a clean, clinical daily Vitamin C that builds results over time
WHY THD OVER TRADITIONAL VITAMIN C?
L-Ascorbic Acid is the most extensively studied form of Vitamin C in skincare — but it is notoriously unstable in water-based formulas. The moment it is mixed with water, it begins to oxidise and lose potency. Many serums are already significantly degraded by the time they reach your skin.
Tetrahexyldecyl Ascorbate (THD) solves this. It is oil-soluble, highly stable and able to penetrate into the skin's lipid layers — where it converts to active Vitamin C and delivers the same skin benefits as L-Ascorbic Acid without the instability and irritation.
No degradation. No irritation. No orange residue. Just stable, active Vitamin C — every day.
