Obagi C5 Vitamin C Serum 12ml - entry-level vitamin C brightening serum for sensitive skin Japan

Obagi C5 Vitamin C Serum 12ml

$32.25
$32.25 $34.61
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Obagi C5 Vitamin C Serum 12ml - entry-level vitamin C brightening serum for sensitive skin Japan
Obagi C5 Vitamin C Serum 12ml
Obagi

Obagi C5 Vitamin C Serum 12ml

$32.25
$32.25 $34.61
In stock
  • ✅ 5% pure ascorbic acid — gentle entry-level potency
  • ✅ Advanced C Control EX for deeper skin absorption
  • ✅ Vitamins C + E for moisture and pore smoothing
  • ✅ Grapefruit fragrance, lightweight dropper texture
  • ✅ Japan-domestic pharmaceutical formula by Rohto
  • ✅ Free from fragrance overload — subtle yuzu-grapefruit scent

🛡️ 100% Authentic – Japan domestic version
🚚 Ships from Tokyo
✨ Delivery in 4-6 business days

Description

Obagi C5 Vitamin C Serum 12ml is the entry-level product in Obagi's pharmaceutical-grade pure Vitamin C serum range — delivering 5% L-Ascorbic Acid for oily, sensitive, and Vitamin C-naive skin that is beginning to notice dull tone, early sun spots, rough texture, and enlarged pores. The C5 is the appropriate starting point before escalating to higher concentrations within the Obagi C Series.

  • 5% pure L-Ascorbic Acid — low-concentration entry point for Vitamin C-sensitive skin or first-time users building tolerance
  • Iris Root Extract (Deep C Porter) — facilitates delivery of Vitamin C to the deeper stratum corneum layers
  • Tocopherol (Vitamin E) — works synergistically with Vitamin C and improves moisture retention
  • Advanced C Control EX — Obagi's proprietary stabilisation system that maintains L-Ascorbic Acid potency across the product's use life
  • Lightweight dropper texture — applies as a thin, fast-absorbing layer suitable under toner, serum, and moisturiser
  • 12ml — approximately 60–90 days at 3–4 drops daily; the small size is appropriate given L-Ascorbic Acid's stability limits

How it works: L-Ascorbic Acid at 5% is clinically shown to inhibit tyrosinase (the enzyme that produces melanin) and provide antioxidant protection against UV-triggered free radical damage — the two core brightening mechanisms. At 5%, the active penetrates effectively for maintenance and prevention with minimal irritation risk, making it the recommended starting concentration for new Vitamin C users or those with sensitive, reactive skin.

Obagi C Series concentration guide — which to use: C5 for Vitamin C-naive or sensitive skin; mild dullness and early pore concerns. C10 for established Vitamin C users with moderate pore and texture concerns — the most widely recommended starting point for non-sensitive skin. C20 for skin with advanced dullness, persistent sun spots, and deep uneven tone after establishing a C10 routine. C25 Neo for intensive clinical-grade treatment of severe pigmentation. Start at C5 if Vitamin C has caused tingling or redness before; start at C10 if skin has no previous reaction to Vitamin C.

Known in Japan as オバジ C5セラム 12ml.

Key Ingredients
  • Ascorbic Acid (Pure Vitamin C) — 5% pure vitamin C for brightening, pore smoothing, and antioxidant protection
  • Tocopherol (Vitamin E) — supports moisture retention and enhances vitamin C stability
  • Iris Root Extract — key component of Deep C Porter technology, aids vitamin C delivery to deeper skin layers
  • Centella Asiatica Extract — calms inflammation and supports collagen synthesis alongside vitamin C
  • Artichoke Leaf Extract — research-backed ingredient targeting visibly enlarged pores

HOW TO USE
  1. After washing your face, apply toner to prep and hydrate skin.
  2. Dispense 3–4 drops into your palm using the dropper.
  3. Press gently across the entire face, focusing on dull or uneven areas.
  4. Follow with emulsion or moisturiser to seal in hydration.
  5. Pro tip: If tingling occurs, apply after your emulsion step rather than before — it reduces sensation without reducing efficacy.

FAQ

How is C5 different from C10, C20, and C25?

The number refers to pure vitamin C concentration. C5 is 5%, C10 is 10%, C20 is 20%, and C25 Neo is 25%. Higher concentrations address a broader range of concerns — pores, texture, dark spots, firmness — but may feel more intense on sensitive skin. C5 is the gentlest starting point.

Will this cause redness or irritation?

A brief tingling sensation on first use is common and typically passes quickly. If redness persists or worsens, discontinue use. Applying over a toner-hydrated skin base helps minimise the sensation. C5 is the lowest-irritation entry in the Obagi C lineup.

When should I apply it in my routine?

Apply morning and evening after toner, before emulsion or moisturiser. On dry-feeling days, you can layer it after your emulsion for a gentler delivery.

Is this the Japan-domestic version?

Yes. This is the Japan-domestic formula sourced directly from Japanese drugstores including Matsumotokiyoshi. TokyoShelf carries only the version sold in Japan, not an export reformulation.

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