Obagi C20 Vitamin C Serum 15ml

Obagi C20 Vitamin C Serum 15ml

$76.69
$76.69
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Obagi C20 Vitamin C Serum 15ml
Obagi C20 Vitamin C Serum 15ml
Obagi

Obagi C20 Vitamin C Serum 15ml

$76.69
$76.69
In stock
  • ✅ 20% pure ascorbic acid — intensive pigmentation potency
  • ✅ Deep C Porter + Advanced C Control EX dual delivery
  • ✅ Signal Lock Complex maintains hydration at high concentration
  • ✅ Larger 15ml bottle — more intensive treatment format
  • ✅ Rohto pharmaceutical-grade Japan-domestic formula
  • ✅ Free from parabens, mineral oil, colorants

🛡️ 100% Authentic – Japan domestic version
🚚 Ships from Tokyo
✨ Fresh stock
🛍️ Same product sold in Japanese beauty stores

Description

Obagi C20 Vitamin C Serum is the high-intensity step in the Obagi C Series, delivering 20% pure ascorbic acid for those with established vitamin C routines who want to target persistent pigmentation, enlarged pores, rough texture, and advanced dullness in a single serum. This Japan-domestic formula by Rohto Pharmaceutical builds on the same Deep C Porter and Advanced C Control EX technology as C5 and C10, but at a concentration level designed for visible results on more stubborn concerns.

At 20% pure vitamin C, Signal Lock Complex works alongside high-dose ascorbic acid to maintain multi-layer hydration — counteracting the dryness that can accompany higher-potency vitamin C use. Vitamin E is co-formulated throughout the series for antioxidant reinforcement and stability. The C20 bottle is slightly larger at 15ml versus the 12ml found in C5, C10, and C25, reflecting its positioning as a more intensive treatment for experienced users.

C20 is the bridge between the everyday-maintenance C10 and the full-spectrum C25 Neo. If you've used C10 consistently and want to escalate before committing to C25, this is the natural progression.

Key Ingredients
  • Ascorbic Acid (Pure Vitamin C) — 20% high-dose brightening, pore control, and antioxidant treatment
  • Tocopherol (Vitamin E) — stabilises vitamin C and reinforces skin moisture barrier
  • Iris Root Extract — Deep C Porter component; facilitates vitamin C delivery to stratum corneum
  • Centella Asiatica Extract — calms skin sensitisation at high potency while supporting collagen
  • Artichoke Leaf Extract — pore-tightening action via NF-κB pathway modulation

HOW TO USE
  1. Cleanse and apply toner to thoroughly prep and hydrate skin.
  2. Dispense 3–4 drops into your palm using the dropper.
  3. Press gently across the face, concentrating on dark spots and dull areas.
  4. Follow with emulsion or moisturiser to buffer and seal.
  5. Pro tip: At 20% concentration, always apply on well-moisturised skin. If tingling is strong, apply after emulsion rather than before.

FAQ

How is C20 different from C25 Neo?

C20 provides 20% pure vitamin C with the full Obagi C series technology. C25 Neo adds two additional exclusive actives — Power Claw (harpagophytum root extract) and White Signal Complex — enabling it to also target fine lines and loss of firmness. C20 focuses on brightening and pore care; C25 Neo is the full-spectrum anti-aging option.

Is C20 suitable for daily use?

Yes, Obagi recommends twice-daily use morning and evening. Introduce it gradually if you're new to 20% concentration — start with once daily, then build up as your skin adapts.

Why is C20 a larger bottle than C10 or C25?

C20 comes in 15ml versus 12ml for C10 and C25 Neo. It reflects Obagi's positioning of C20 as an intensive treatment format for established users who use higher volumes per application.

Is this the Japan-domestic version?

Yes. Sourced from Japanese drugstores including Matsumotokiyoshi, this is the genuine Japan-domestic formula by Rohto — the same product sold in Japanese pharmacies, not an export version. TokyoShelf sources only domestic-market formulas.

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