
The Everyday Glow, Measured
After 28 days of daily use, our test group saw skin looking noticeably brighter and more even-toned. That's the point of a stable 10% vitamin C — visible, everyday radiance from a comfortable daily dose.
Vitamin C That Actually Lasts
Most vitamin C oxidizes and fades within weeks of opening. Ours is built to stay active — holding nearly all of its potency for a full year after opening, so the last drop works as hard as the first.
Why THD Ascorbate
We use tetrahexyldecyl ascorbate — an oil-soluble, exceptionally stable form of vitamin C. It's gentle enough for daily use, won't sting or oxidize the way pure ascorbic acid can, and brings antioxidant defense and brightening in one comfortable step.
What's THD ascorbate, and how is it different from regular vitamin C?
THD (tetrahexyldecyl ascorbate) is an oil-soluble, highly stable form of vitamin C. Unlike pure ascorbic acid — which can sting, oxidize quickly and turn brown — THD stays stable, absorbs comfortably into an oil base, and is gentle enough for sensitive skin and daily use. You get the glow of vitamin C without the drama.
Is 10% strong enough — and how do I choose between the 7%, 10%, 20% and 30%?
10% is the everyday sweet spot and the best all-round starting point for most skin: stronger than the gentle 7%, but easier than the advanced 20% and 30%. If you're new to vitamin C or want a comfortable daily glow step, start at 10% and build up from there if your skin wants more.
When and how do I use it?
Use 2–3 drops on clean skin, morning or night, after your water-based serums and before your moisturizer or SPF. It layers happily under sunscreen for the day, and a drop mixed into foundation gives a dewy finish. A little goes a long way.
Will it sting or irritate sensitive skin?
It's designed not to. Because it's oil-soluble THD rather than pure ascorbic acid, there's no water, no acidity and no sting — it's dermatologically tested and made with sensitive skin in mind. As always, patch test before first use and keep it away from the eyes.
Can I use it alongside my other actives?
Yes — it sits comfortably in most routines and layers well under SPF. If you're also using strong actives like retinol or exfoliating acids, introduce them on alternating days at first so your skin can adjust, then build the combination that feels good.
10% stabilized vitamin C (THD) for visible brightness & glow



