Advanced THD Vitamin C Serum
Advanced THD Vitamin C Serum
8% THD Vitamin C for mature and sensitive skin — highly stable, oil-soluble Vitamin C for brighter, more even-looking skin.
Couldn't load pickup availability
Tetrahexyldecyl Ascorbate (THD) is an advanced, oil-soluble form of Vitamin C chosen for its stability, elegant skin feel and suitability for daily use. This water-free serum supports antioxidant protection, collagen, brightness and a more even-looking skin tone.
Real Results. Real People. 6 Weeks.
Dale · Advanced THD Vitamin C Serum · Week 6 · No filters
Trial Results
8-week user trial
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 This Serum Does
The Advanced THD Vitamin C Serum delivers stable, oil-soluble Vitamin C into the skin’s lipid environment, where it is converted to active Vitamin C and supports collagen, helps improve the appearance of pigmentation and uneven skin tone, and improves overall skin quality over time.
Its highly stable, water-free formulation absorbs quickly, leaves no greasy residue and is well suited to consistent daily use.
WHAT YOU MAY NOTICE WITH CONSISTENT USE
- Brighter, more even-looking skin tone
- Smoother-looking skin texture
- Softer appearance of fine lines over time
- Improved appearance of pigmentation and sun spots
- Skin that feels softer, smoother and more supple
- Daily antioxidant support against environmental stressors
- Some users may also notice reduced redness and a calmer-looking complexion
THIS IS FOR YOU IF:
- You want a Vitamin C serum for mature or sensitive skin
- Pigmentation, sun spots or uneven skin tone are a concern
- You want to support collagen and soften the appearance of fine lines
- You want a stable, oil-soluble Vitamin C suitable for consistent daily use
- You care deeply about what goes on your skin and won't compromise on ingredients
- You want visible results without an aggressive formulation
WHY THD VITAMIN C?
Tetrahexyldecyl Ascorbate (THD) is an advanced, oil-soluble form of Vitamin C with excellent formulation stability and compatibility with lipid-based skincare. Within the skin, it is converted to active Vitamin C, where it provides antioxidant support and helps support collagen, brightness and a more even-looking skin tone.
Our 8% THD serum is completely water-free, creating an elegant, stable lipid formulation designed for comfortable, consistent daily use.
L-Ascorbic Acid is a different form of Vitamin C — direct, water-soluble and extensively studied. Because it is water-soluble, it requires a different formulation approach and is typically used at an acidic pH.
