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[ DemythSkin Verdict ]

numbuzin

numbuzin No.5 Goodbye Blemish Serum

Name: numbuzin No.5 Goodbye Blemish Serum
Brand: numbuzin

SerumBrightening

Efficacy

Solid

3.8 / 5.0

Safety

Mostly Safe

3.9 / 5.0

System Verdict

This is a solid hydrating, mildly brightening serum with decent blemish-support, but its essential oil fragrance and scattered vitamin C derivatives keep it from being a top-tier treatment. Efficacy is driven mainly by mid-list niacinamide, multiple humectants, soothing agents like panthenol and allantoin, and some supporting brightening/antioxidant botanicals, while the three vitamin C forms appear low enough in the list that their concentration is likely modest and not at clinically strong levels; overall you get helpful hydration and tone support rather than a powerhouse anti-acne or pigment-correcting treatment.

Active Ingredients Detected

S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative

Ascorbic Acid

A Tier: Good BasicsProven Results

GlycerinNiacinamideAllantoinPanthenolSodium HyaluronateAscorbyl Glucoside3-O-Ethyl Ascorbic Acid

B Tier: Supporting IngredientsPromising Ingredients

Methyl Gluceth-20Hippophae Rhamnoides ExtractGlycereth-26Dipotassium GlycyrrhizateHydrolyzed Jojoba EstersCentella Asiatica ExtractCamellia Sinensis Leaf Extract

C Tier: Marketing IdolsHype | Limited or Weak Data

Melia Azadirachta Flower ExtractOcimum Sanctum Leaf ExtractMelia Azadirachta Leaf ExtractCurcuma Longa (Turmeric) Root ExtractCorallina Officinalis ExtractGlycyrrhiza Glabra (Licorice) Root ExtractPolygonum Cuspidatum Root ExtractScutellaria Baicalensis Root ExtractChamomilla Recutita (Matricaria) Flower ExtractRosmarinus Officinalis (Rosemary) Leaf Extract

D Tier: Potential IrritantsBe Cautious

Citrus Limon (Lemon) Peel OilCitrus Aurantium Dulcis (Orange) Peel OilCitrus Aurantifolia (Lime) OilLimoneneCitral

What Each Ingredient Does

Water: Solvent base
Butylene Glycol: Humectant and solvent
Methyl Gluceth-20: Humectant, skin conditioning
Dipropylene Glycol: Solvent, texture aid
Glycerin: Core humectant
1,2-Hexanediol: Solvent, preservative booster
Niacinamide: Multifunctional brightening active
Hippophae Rhamnoides Extract: Plant extract, antioxidant
Glycereth-26: Humectant, slip enhancer
Ammonium Acryloyldimethyltaurate/VP Copolymer: Film-forming thickener
Polyglyceryl-10 Laurate: Emulsifier, surfactant
Allantoin: Soothing skin protectant
Carbomer: Gelling agent, thickener
Tromethamine: pH adjuster, neutralizer
Panthenol: Humectant, soothing agent
Dipotassium Glycyrrhizate: Soothing licorice-derived agent
Disodium EDTA: Chelator for stability
Sodium Hyaluronate: Hyaluronic acid humectant
Melia Azadirachta Flower Extract: Botanical extract, antioxidant
Ocimum Sanctum Leaf Extract: Botanical extract, soothing
Melia Azadirachta Leaf Extract: Botanical extract, antioxidant
Citrus Limon (Lemon) Peel Oil: Fragrant essential oil
Curcuma Longa (Turmeric) Root Extract: Botanical extract, antioxidant
Corallina Officinalis Extract: Marine-derived antioxidant extract

Full Ingredient List (INCI)

Water, Butylene Glycol, Methyl Gluceth-20, Dipropylene Glycol, Glycerin, 1,2-Hexanediol, Niacinamide, Hippophae Rhamnoides Extract, Glycereth-26, Ammonium Acryloyldimethyltaurate/VP Copolymer, Polyglyceryl-10 Laurate, Allantoin, Carbomer, Tromethamine, Panthenol, Dipotassium Glycyrrhizate, Disodium EDTA, Sodium Hyaluronate, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Melia Azadirachta Leaf Extract, Citrus Limon (Lemon) Peel Oil, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Hydrolyzed Jojoba Esters, Citrus Aurantium Dulcis (Orange) Peel Oil, Citrus Aurantifolia (Lime) Oil, Ascorbyl Glucoside, Ascorbic Acid, Glycyrrhiza Glabra (Licorice) Root Extract, 3-O-Ethyl Ascorbic Acid, Centella Asiatica Extract, Camellia Sinensis Leaf Extract, Polygonum Cuspidatum Root Extract, Scutellaria Baicalensis Root Extract, Chamomilla Recutita (Matricaria) Flower Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Limonene, Citral

Frequently Asked

Is numbuzin No.5 Goodbye Blemish Serum worth it?

numbuzin No.5 Goodbye Blemish Serum scores 3.8 out of 5.0 for efficacy (Solid) and 3.9 out of 5.0 for safety (Mostly Safe) on DemythSkin's independent ingredient analysis. This is a solid hydrating, mildly brightening serum with decent blemish-support, but its essential oil fragrance and scattered vitamin C derivatives keep it from being a top-tier treatment. Efficacy is driven mainly by m

What are the key active ingredients in numbuzin No.5 Goodbye Blemish Serum?

numbuzin No.5 Goodbye Blemish Serum contains these gold-standard actives with strong clinical evidence: Ascorbic Acid.

Does numbuzin No.5 Goodbye Blemish Serum contain fragrance or known irritants?

DemythSkin flags these ingredients in numbuzin No.5 Goodbye Blemish Serum as potential irritants: Citrus Limon (Lemon) Peel Oil, Citrus Aurantium Dulcis (Orange) Peel Oil, Citrus Aurantifolia (Lime) Oil, Limonene, Citral.

How is numbuzin No.5 Goodbye Blemish 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.

Analyze on DemythSkin →

Analysis last updated: 2026-08-17. DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score.