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[ DemythSkin Verdict ]

Numbuzin No.5 Vitamin Concentrated Serum

SerumBrightening

Efficacy

Exceptional

4.5 / 5.0

Safety

Safe

4.6 / 5.0

System Verdict

This is a legitimately high-evidence brightening serum, not just marketing fluff. The efficacy score is driven by niacinamide placed very high in the INCI, plus tranexamic acid and alpha-arbutin in early-mid positions for real pigmentation control, supported by a stable vitamin C derivative (3-O-ethyl ascorbic acid) and multiple humectants and soothing agents; glutathione is mostly marketing, but the core actives and their positions indicate meaningful concentrations for tone evening.

Active Ingredients Detected

S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative

Tranexamic Acid

A Tier: Good BasicsProven Results

NiacinamidePanthenolSorbitolBifida Ferment LysateButyrospermum Parkii (Shea) ButterAlpha-ArbutinSodium HyaluronateGlycerin3-O-Ethyl Ascorbic AcidTocopherolAdenosine

B Tier: Supporting IngredientsPromising Ingredients

Neopentyl Glycol Dicaprate

C Tier: Marketing IdolsHype | Limited or Weak Data

Vaccinium Vitis-Idaea Fruit ExtractChondrus Crispus ExtractSaccharum Officinarum (Sugarcane) ExtractMelia Azadirachta Flower ExtractOcimum Sanctum Leaf ExtractMelia Azadirachta Leaf ExtractCurcuma Longa (Turmeric) Root ExtractCorallina Officinalis ExtractTremella Fuciformis (Mushroom) ExtractGlutathione

What Each Ingredient Does

Vaccinium Vitis-Idaea Fruit Extract: Antioxidant, supportive brightening
Butylene Glycol: Solvent and humectant
Niacinamide: Tone evening, barrier support
Panthenol: Soothing and barrier repair
Tranexamic Acid: Pigmentation modulation, brightening
Water: Solvent base
1,2-Hexanediol: Solvent, antimicrobial preservative booster
Neopentyl Glycol Dicaprate: Emollient texture enhancer
Caprylic/Capric Triglyceride: Light emollient, reduces TEWL
Sorbitol: Humectant and texture aid
Bifida Ferment Lysate: Probiotic-derived soothing active
Chondrus Crispus Extract: Film-forming, hydration support
Butyrospermum Parkii (Shea) Butter: Rich emollient, occlusive
Saccharum Officinarum (Sugarcane) Extract: Humectant, minor exfoliation potential
Alpha-Arbutin: Melanin inhibition, brightening
Sodium Hyaluronate: Humectant, hydration
Melia Azadirachta Flower Extract: Botanical antioxidant, soothing
Ocimum Sanctum Leaf Extract: Botanical antioxidant, anti-inflammatory
Melia Azadirachta Leaf Extract: Botanical antioxidant, anti-inflammatory
Curcuma Longa (Turmeric) Root Extract: Antioxidant, possible brightening
Corallina Officinalis Extract: Mineral-rich soothing extract
Tremella Fuciformis (Mushroom) Extract: Humectant, film-forming
Pentylene Glycol: Humectant and solvent
Glycerin: Core humectant, hydration

Full Ingredient List (INCI)

Vaccinium Vitis-Idaea Fruit Extract, Butylene Glycol, Niacinamide, Panthenol, Tranexamic Acid, Water, 1,2-Hexanediol, Neopentyl Glycol Dicaprate, Caprylic/Capric Triglyceride, Sorbitol, Bifida Ferment Lysate, Chondrus Crispus Extract, Butyrospermum Parkii (Shea) Butter, Saccharum Officinarum (Sugarcane) Extract, Alpha-Arbutin, Sodium Hyaluronate, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Melia Azadirachta Leaf Extract, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Tremella Fuciformis (Mushroom) Extract, Pentylene Glycol, Glycerin, 3-O-Ethyl Ascorbic Acid, Glutathione, Tocopherol, Ethylhexylglycerin, Adenosine, Disodium EDTA

Frequently Asked

Is Numbuzin No.5 Vitamin Concentrated Serum worth it?

Numbuzin No.5 Vitamin Concentrated Serum scores 4.5 out of 5.0 for efficacy (Exceptional) and 4.6 out of 5.0 for safety (Safe) on DemythSkin's independent ingredient analysis. This is a legitimately high-evidence brightening serum, not just marketing fluff. The efficacy score is driven by niacinamide placed very high in the INCI, plus tranexamic acid and alpha-arbutin in early-mid positions fo

What are the key active ingredients in Numbuzin No.5 Vitamin Concentrated Serum?

Numbuzin No.5 Vitamin Concentrated Serum contains these gold-standard actives with strong clinical evidence: Tranexamic Acid.

Does Numbuzin No.5 Vitamin Concentrated Serum contain fragrance or known irritants?

DemythSkin's analysis found no flagged irritants in Numbuzin No.5 Vitamin Concentrated Serum. It scores 4.6 out of 5.0 for safety.

How is Numbuzin No.5 Vitamin Concentrated Serum scored?

DemythSkin grades every product on two independent axes: efficacy (whether the ingredients have clinical evidence of working) and safety (irritation and sensitisation risk). Ingredients are classified S through D against a database of over 3,000 compounds. No brand pays for a score.

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Analysis last updated: 2026-07-24. DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score. DemythSkin earns commission from affiliate links (Amazon Associates and others). Scores are computed before any commercial relationship — the link follows the verdict, never the other way around.