Vitamin C Face Oil (THDA) for Bright, Glowing Skin
The stable form of Vitamin C, in an oil base that actually absorbs. Brighter skin over time.
Not all Vitamin C is created equal. This form holds up.
Most Vitamin C in skincare is L-ascorbic acid — effective, but unstable. It oxidizes fast and loses potency before it has a chance to work. Tetrahexyldecyl ascorbate is the oil-soluble derivative, and the advantages are real: more stable, penetrates the stratum corneum more efficiently, and in vitro data shows it converts to ascorbic acid in the skin. Brightening and collagen synthesis data are promising, though robust human trials are still limited. This is a better delivery vehicle than most conventional Vitamin C products — and for anyone who's given up on Vitamin C because it irritated or stopped working, this is worth trying.
- You want to fade dark spots or even out skin tone over time
- You've tried Vitamin C serums that irritated your skin or oxidized fast
- You prefer an oil-based routine or want to add Vitamin C to one
- You want antioxidant protection built into your daily routine
This vitamin C (THDA) face oil combines a highly stable, oil-soluble form of vitamin C with lightweight antioxidant-rich oils. Watermelon seed and baobab oils help nourish and soften while THDA targets dullness, supporting a brighter, more even-looking complexion and a healthy, radiant glow.
Tetrahexyldecyl Ascorbate (THDA) is a superior form of Vitamin C. It is more powerful, stable, and biocompatible than conventional Vitamin C.
What's inside.
Why it's there.
The oil-soluble, stable derivative of Vitamin C. Where L-ascorbic acid oxidizes quickly and can cause irritation, THDA holds its potency and penetrates efficiently. In vitro data shows it converts to ascorbic acid within the skin, inhibits melanin production, and supports collagen synthesis. A smarter delivery form for people who want results without the instability.
Cold-pressed from watermelon seeds, this oil has a high linoleic acid content — the fatty acid that helps regulate sebum and support barrier function. It absorbs quickly and doesn't feel heavy, which keeps this face oil from sitting on the skin. A well-chosen carrier for a brightening formula.
Sourced from the baobab tree — one of the most nutrient-dense botanicals on the continent. Rich in oleic, linoleic, and palmitic fatty acids, it nourishes deeply without clogging pores. It rounds out the oil base and adds the kind of skin-conditioning depth a brightening formula needs to avoid feeling thin or one-dimensional.
What it does.
A lightweight face oil delivering Tetrahexyldecyl Ascorbate — a stable, oil-soluble form of Vitamin C — in a base of watermelon seed oil, baobab, and fractionated coconut oil. Works over time to brighten, protect against environmental damage, and support a more even complexion. Use morning or evening as the last step before SPF.
Organic Caprylic/Capric Triglycerides (Fractionated Coconut Oil), Organic Citrullus Lanatus (Watermelon) Seed Oil, Tetrahexyldecyl Ascorbate (Vitamin C), Adansonia Digitata (Baobab Seed) Oil, Rosmarinus Officinalis (Rosemary) Leaf Extract
- Apply 3–4 drops to clean, dry skin morning or evening
- 02 — Press gently into skin — don't rub
- 03 — If using in the morning, follow immediately with SPF
- 04 — Can be layered under moisturizer or used alone as the final step
- 05 — Consistent daily use is what delivers visible brightening — give it 6–8 weeks