THD-Ascorbate Vitamin C Serum bottle by Dr. Koo — stable lipid-soluble formula stays clear and active
Anti-Oxidant Vitamin C Serum — clinical-strength THD-Ascorbate for collagen support, tone brightening, and firmness
Vitamin C serum comparison chart — Dr. Koo THD-Ascorbate vs SkinCeuticals, La Mer, Dr. Barbara Sturm, Augustinus Bader
Before and after clinical results — 12-week THD-Ascorbate study showing 97% fine line improvement, 94% elasticity, 94% radiance
5-star customer review for Dr. Koo Anti-Oxidant Vitamin Serum — soft, plump, hydrated, glowing skin after 3 weeks
Dr. Koo Anti-Oxidant Vitamin Serum bottle with vitamin cofactor capsules — essential co-factors for skin metabolism
Dr. Koo Powerhouse Barrier Vitamin Complex infographic — Vitamins C, D, E, F, K for skin barrier defense and recovery
Barrier-boosting hydration ingredients — ceramides, jojoba oil, and marula oil for lipid barrier support in Dr. Koo Vitamin Serum
Dr. Koo AM and PM skincare routine — morning protect-hydrate-nourish and night cleanse-transform-replenish regimen
Skin Barrier 101 — how Anti-Oxidant Vitamin Serum with ceramides and fatty acids repairs and protects the skin barrier
Damaged vs healthy skin barrier diagram — how strong barrier function creates smooth, hydrated, firm skin
Silky soothing fast-absorbing Anti-Oxidant Vitamin Serum — no parabens, phthalates, fragrance, dyes, gluten, or eco-toxins, safe for all skin types
Dr. Koo Anti-Oxidant Vitamin Serum — future-proof your skin with antioxidant defense, collagen support, brightening, and UV pollution protection
Surgeon-formulated THD-Ascorbate at therapeutic concentration

Anti-Oxidant Vitamin Serum

Sale price$200.00
- THD-Ascorbate — a lipid-soluble Vitamin C that penetrates the stratum corneum to reach the dermis, where collagen is actually built
- Therapeutic dose, not a marketing dose — every active at the concentration where clinical studies show measurable tissue response
- Supports collagen triple-helix formation — the structural protein that determines skin firmness, elasticity, and wrinkle depth
- Multi-vitamin complex (C, D, E, F, K) with ceramides and marula oil — lipid-soluble delivery vehicles that reinforce the skin barrier
- 97% improvement in fine lines | 94% radiance | 91% firmness — independent 12-week clinical study, 33 patients ages 40-65
Original size: 30ml

I formulated this serum because I operate on skin every day. I see collagen architecture under magnification. I know what tissue needs to regenerate — and what it doesn't need. THD-Ascorbate was chosen because it reaches the dermis where the science actually happens. Every ingredient in this formula earns its place. No fillers. No marketing doses. Just what your skin needs at the cellular level. — Dr. Michele Koo, MD, FACS

From Dr. Michele Koo, board‑certified plastic surgeon
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